Adding (moving from bf-translation) the i18n python module. This will make it available for future "UI Translation" addon, and probably other UI-related tools as well.

Notes:
* This is a somewhat reworked version of what is currently in bf-translation's trunk/po/tools, not yet fully functionnal (well, 95% is ;) ) nor fully tested. ultimately, it will replace it (being "svn-linked" in bf-translation).
* Added feature: more complete/strict tests (yet some work to be done here).
* Added spell checking (huge spellcheck commit incomming...).
* Trying to get rid of xgettext itself (should e.g. allow us to use #defines as contexts, among other things...). But currently captures less strings, work needed here too.

Please note this includes libfribidi.dll, as it is hard to find it for windows (unixes should have no problems here).

17 files changed, 3372 insertions, 0 deletions

diff --git a/release/scripts/modules/i18n/__init__.py b/release/scripts/modules/i18n/__init__.py
new file mode 100644
index 00000000000..4072247c6d6
--- /dev/null
+++ b/release/scripts/modules/i18n/__init__.py
@@ -0,0 +1,21 @@
+# ##### BEGIN GPL LICENSE BLOCK #####
+#
+#  This program is free software; you can redistribute it and/or
+#  modify it under the terms of the GNU General Public License
+#  as published by the Free Software Foundation; either version 2
+#  of the License, or (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software Foundation,
+#  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ##### END GPL LICENSE BLOCK #####
+
+# <pep8 compliant>
+
+"""Package for translation (i18n) tools."""
diff --git a/release/scripts/modules/i18n/bl_process_msg.py b/release/scripts/modules/i18n/bl_process_msg.py
new file mode 100644
index 00000000000..0a28a6768e6
--- /dev/null
+++ b/release/scripts/modules/i18n/bl_process_msg.py
@@ -0,0 +1,544 @@
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+# <pep8-80 compliant>
+
+# Write out messages.txt from Blender.
+# XXX: This script is meant to be used from inside Blender!
+#      You should not directly use this script, rather use update_msg.py!
+
+import os
+
+# Quite an ugly hack… But the simplest solution for now!
+#import sys
+#sys.path.append(os.path.abspath(os.path.dirname(__file__)))
+import i18n.settings as settings
+
+
+#classes = set()
+
+
+SOURCE_DIR = settings.SOURCE_DIR
+
+CUSTOM_PY_UI_FILES = [os.path.abspath(os.path.join(SOURCE_DIR, p))
+                      for p in settings.CUSTOM_PY_UI_FILES]
+FILE_NAME_MESSAGES = settings.FILE_NAME_MESSAGES
+COMMENT_PREFIX = settings.COMMENT_PREFIX
+CONTEXT_PREFIX = settings.CONTEXT_PREFIX
+CONTEXT_DEFAULT = settings.CONTEXT_DEFAULT
+UNDOC_OPS_STR = settings.UNDOC_OPS_STR
+
+NC_ALLOWED = settings.WARN_MSGID_NOT_CAPITALIZED_ALLOWED
+
+def check(check_ctxt, messages, key, msgsrc):
+    if check_ctxt is None:
+        return
+    multi_rnatip = check_ctxt.get("multi_rnatip")
+    multi_lines = check_ctxt.get("multi_lines")
+    py_in_rna = check_ctxt.get("py_in_rna")
+    not_capitalized = check_ctxt.get("not_capitalized")
+    end_point = check_ctxt.get("end_point")
+    undoc_ops = check_ctxt.get("undoc_ops")
+
+    if multi_rnatip is not None:
+        if key in messages and key not in multi_rnatip:
+            multi_rnatip.add(key)
+    if multi_lines is not None:
+        if '\n' in key[1]:
+            multi_lines.add(key)
+    if py_in_rna is not None:
+        if key in py_in_rna[1]:
+            py_in_rna[0].add(key)
+    if not_capitalized is not None:
+        if(key[1] not in NC_ALLOWED and key[1][0].isalpha() and
+           not key[1][0].isupper()):
+            not_capitalized.add(key)
+    if end_point is not None:
+        if key[1].strip().endswith('.'):
+            end_point.add(key)
+    if undoc_ops is not None:
+        if key[1] == UNDOC_OPS_STR:
+            undoc_ops.add(key)
+
+
+def dump_messages_rna(messages, check_ctxt):
+    import bpy
+
+    def classBlackList():
+        blacklist_rna_class = [# core classes
+                               "Context", "Event", "Function", "UILayout",
+                               "BlendData",
+                               # registerable classes
+                               "Panel", "Menu", "Header", "RenderEngine",
+                               "Operator", "OperatorMacro", "Macro",
+                               "KeyingSetInfo", "UnknownType",
+                               # window classes
+                               "Window",
+                               ]
+
+        # ---------------------------------------------------------------------
+        # Collect internal operators
+
+        # extend with all internal operators
+        # note that this uses internal api introspection functions
+        # all possible operator names
+        op_ids = set(cls.bl_rna.identifier for cls in
+                     bpy.types.OperatorProperties.__subclasses__()) | \
+                 set(cls.bl_rna.identifier for cls in
+                     bpy.types.Operator.__subclasses__()) | \
+                 set(cls.bl_rna.identifier for cls in
+                     bpy.types.OperatorMacro.__subclasses__())
+
+        get_instance = __import__("_bpy").ops.get_instance
+        path_resolve = type(bpy.context).__base__.path_resolve
+        for idname in op_ids:
+            op = get_instance(idname)
+            if 'INTERNAL' in path_resolve(op, "bl_options"):
+                blacklist_rna_class.append(idname)
+
+        # ---------------------------------------------------------------------
+        # Collect builtin classes we don't need to doc
+        blacklist_rna_class.append("Property")
+        blacklist_rna_class.extend(
+                [cls.__name__ for cls in
+                 bpy.types.Property.__subclasses__()])
+
+        # ---------------------------------------------------------------------
+        # Collect classes which are attached to collections, these are api
+        # access only.
+        collection_props = set()
+        for cls_id in dir(bpy.types):
+            cls = getattr(bpy.types, cls_id)
+            for prop in cls.bl_rna.properties:
+                if prop.type == 'COLLECTION':
+                    prop_cls = prop.srna
+                    if prop_cls is not None:
+                        collection_props.add(prop_cls.identifier)
+        blacklist_rna_class.extend(sorted(collection_props))
+
+        return blacklist_rna_class
+
+    blacklist_rna_class = classBlackList()
+
+    def filterRNA(bl_rna):
+        rid = bl_rna.identifier
+        if rid in blacklist_rna_class:
+            print("  skipping", rid)
+            return True
+        return False
+
+    check_ctxt_rna = check_ctxt_rna_tip = None
+    if check_ctxt:
+        check_ctxt_rna = {"multi_lines": check_ctxt.get("multi_lines"),
+                          "not_capitalized": check_ctxt.get("not_capitalized"),
+                          "end_point": check_ctxt.get("end_point"),
+                          "undoc_ops": check_ctxt.get("undoc_ops")}
+        check_ctxt_rna_tip = check_ctxt_rna
+        check_ctxt_rna_tip["multi_rnatip"] = check_ctxt.get("multi_rnatip")
+
+    # -------------------------------------------------------------------------
+    # Function definitions
+
+    def walkProperties(bl_rna):
+        import bpy
+
+        # Get our parents' properties, to not export them multiple times.
+        bl_rna_base = bl_rna.base
+        if bl_rna_base:
+            bl_rna_base_props = bl_rna_base.properties.values()
+        else:
+            bl_rna_base_props = ()
+
+        for prop in bl_rna.properties:
+            # Only write this property if our parent hasn't got it.
+            if prop in bl_rna_base_props:
+                continue
+            if prop.identifier == "rna_type":
+                continue
+
+            msgsrc = "bpy.types.{}.{}".format(bl_rna.identifier, prop.identifier)
+            context = getattr(prop, "translation_context", CONTEXT_DEFAULT)
+            if prop.name and (prop.name != prop.identifier or context):
+                key = (context, prop.name)
+                check(check_ctxt_rna, messages, key, msgsrc)
+                messages.setdefault(key, []).append(msgsrc)
+            if prop.description:
+                key = (CONTEXT_DEFAULT, prop.description)
+                check(check_ctxt_rna_tip, messages, key, msgsrc)
+                messages.setdefault(key, []).append(msgsrc)
+            if isinstance(prop, bpy.types.EnumProperty):
+                for item in prop.enum_items:
+                    msgsrc = "bpy.types.{}.{}:'{}'".format(bl_rna.identifier,
+                                                            prop.identifier,
+                                                            item.identifier)
+                    if item.name and item.name != item.identifier:
+                        key = (CONTEXT_DEFAULT, item.name)
+                        check(check_ctxt_rna, messages, key, msgsrc)
+                        messages.setdefault(key, []).append(msgsrc)
+                    if item.description:
+                        key = (CONTEXT_DEFAULT, item.description)
+                        check(check_ctxt_rna_tip, messages, key, msgsrc)
+                        messages.setdefault(key, []).append(msgsrc)
+
+    def walkRNA(bl_rna):
+        if filterRNA(bl_rna):
+            return
+
+        msgsrc = ".".join(("bpy.types", bl_rna.identifier))
+        context = getattr(bl_rna, "translation_context", CONTEXT_DEFAULT)
+
+        if bl_rna.name and (bl_rna.name != bl_rna.identifier or context):
+            key = (context, bl_rna.name)
+            check(check_ctxt_rna, messages, key, msgsrc)
+            messages.setdefault(key, []).append(msgsrc)
+
+        if bl_rna.description:
+            key = (CONTEXT_DEFAULT, bl_rna.description)
+            check(check_ctxt_rna_tip, messages, key, msgsrc)
+            messages.setdefault(key, []).append(msgsrc)
+
+        if hasattr(bl_rna, 'bl_label') and  bl_rna.bl_label:
+            key = (context, bl_rna.bl_label)
+            check(check_ctxt_rna, messages, key, msgsrc)
+            messages.setdefault(key, []).append(msgsrc)
+
+        walkProperties(bl_rna)
+
+    def walkClass(cls):
+        walkRNA(cls.bl_rna)
+
+    def walk_keymap_hierarchy(hier, msgsrc_prev):
+        for lvl in hier:
+            msgsrc = "{}.{}".format(msgsrc_prev, lvl[1])
+            messages.setdefault((CONTEXT_DEFAULT, lvl[0]), []).append(msgsrc)
+
+            if lvl[3]:
+                walk_keymap_hierarchy(lvl[3], msgsrc)
+
+    # -------------------------------------------------------------------------
+    # Dump Messages
+
+    def process_cls_list(cls_list):
+        if not cls_list:
+            return 0
+
+        def full_class_id(cls):
+            """ gives us 'ID.Lamp.AreaLamp' which is best for sorting.
+            """
+            cls_id = ""
+            bl_rna = cls.bl_rna
+            while bl_rna:
+                cls_id = "{}.{}".format(bl_rna.identifier, cls_id)
+                bl_rna = bl_rna.base
+            return cls_id
+
+        cls_list.sort(key=full_class_id)
+        processed = 0
+        for cls in cls_list:
+            walkClass(cls)
+#            classes.add(cls)
+            # Recursively process subclasses.
+            processed += process_cls_list(cls.__subclasses__()) + 1
+        return processed
+
+    # Parse everything (recursively parsing from bpy_struct "class"...).
+    processed = process_cls_list(type(bpy.context).__base__.__subclasses__())
+    print("{} classes processed!".format(processed))
+#    import pickle
+#    global classes
+#    classes = {str(c) for c in classes}
+#    with open("/home/i7deb64/Bureau/tpck_2", "wb") as f:
+#        pickle.dump(classes, f, protocol=0)
+
+    from bpy_extras.keyconfig_utils import KM_HIERARCHY
+
+    walk_keymap_hierarchy(KM_HIERARCHY, "KM_HIERARCHY")
+
+
+
+def dump_messages_pytext(messages, check_ctxt):
+    """ dumps text inlined in the python user interface: eg.
+
+        layout.prop("someprop", text="My Name")
+    """
+    import ast
+
+    # -------------------------------------------------------------------------
+    # Gather function names
+
+    import bpy
+    # key: func_id
+    # val: [(arg_kw, arg_pos), (arg_kw, arg_pos), ...]
+    func_translate_args = {}
+
+    # so far only 'text' keywords, but we may want others translated later
+    translate_kw = ("text", )
+
+    # Break recursive nodes look up on some kind of nodes.
+    # E.g. we don’t want to get strings inside subscripts (blah["foo"])!
+    stopper_nodes = {ast.Subscript,}
+
+    for func_id, func in bpy.types.UILayout.bl_rna.functions.items():
+        # check it has a 'text' argument
+        for (arg_pos, (arg_kw, arg)) in enumerate(func.parameters.items()):
+            if ((arg_kw in translate_kw) and
+                (arg.is_output == False) and
+                (arg.type == 'STRING')):
+
+                func_translate_args.setdefault(func_id, []).append((arg_kw,
+                                                                    arg_pos))
+    # print(func_translate_args)
+
+    check_ctxt_py = None
+    if check_ctxt:
+        check_ctxt_py = {"py_in_rna": (check_ctxt["py_in_rna"], messages.copy()),
+                         "multi_lines": check_ctxt["multi_lines"],
+                         "not_capitalized": check_ctxt["not_capitalized"],
+                         "end_point": check_ctxt["end_point"]}
+
+    # -------------------------------------------------------------------------
+    # Function definitions
+
+    def extract_strings(fp_rel, node):
+        """ Recursively get strings, needed in case we have "Blah" + "Blah",
+            passed as an argument in that case it wont evaluate to a string.
+            However, break on some kind of stopper nodes, like e.g. Subscript.
+        """
+
+        if type(node) == ast.Str:
+            eval_str = ast.literal_eval(node)
+            if eval_str:
+                key = (CONTEXT_DEFAULT, eval_str)
+                msgsrc = "{}:{}".format(fp_rel, node.lineno)
+                check(check_ctxt_py, messages, key, msgsrc)
+                messages.setdefault(key, []).append(msgsrc)
+            return
+
+        for nd in ast.iter_child_nodes(node):
+            if type(nd) not in stopper_nodes:
+                extract_strings(fp_rel, nd)
+
+    def extract_strings_from_file(fp):
+        filedata = open(fp, 'r', encoding="utf8")
+        root_node = ast.parse(filedata.read(), fp, 'exec')
+        filedata.close()
+
+        fp_rel = os.path.relpath(fp, SOURCE_DIR)
+
+        for node in ast.walk(root_node):
+            if type(node) == ast.Call:
+                # print("found function at")
+                # print("%s:%d" % (fp, node.lineno))
+
+                # lambda's
+                if type(node.func) == ast.Name:
+                    continue
+
+                # getattr(self, con.type)(context, box, con)
+                if not hasattr(node.func, "attr"):
+                    continue
+
+                translate_args = func_translate_args.get(node.func.attr, ())
+
+                # do nothing if not found
+                for arg_kw, arg_pos in translate_args:
+                    if arg_pos < len(node.args):
+                        extract_strings(fp_rel, node.args[arg_pos])
+                    else:
+                        for kw in node.keywords:
+                            if kw.arg == arg_kw:
+                                extract_strings(fp_rel, kw.value)
+
+    # -------------------------------------------------------------------------
+    # Dump Messages
+
+    mod_dir = os.path.join(SOURCE_DIR,
+                           "release",
+                           "scripts",
+                           "startup",
+                           "bl_ui")
+
+    files = [os.path.join(mod_dir, fn)
+             for fn in sorted(os.listdir(mod_dir))
+             if not fn.startswith("_")
+             if fn.endswith("py")
+             ]
+
+    # Dummy Cycles has its py addon in its own dir!
+    files += CUSTOM_PY_UI_FILES
+
+    for fp in files:
+        extract_strings_from_file(fp)
+
+
+def dump_messages(do_messages, do_checks):
+    import collections
+
+    def enable_addons():
+        """For now, enable all official addons, before extracting msgids."""
+        import addon_utils
+        import bpy
+
+        userpref = bpy.context.user_preferences
+        used_ext = {ext.module for ext in userpref.addons}
+        support = {"OFFICIAL"}
+        # collect the categories that can be filtered on
+        addons = [(mod, addon_utils.module_bl_info(mod)) for mod in
+                  addon_utils.modules(addon_utils.addons_fake_modules)]
+
+        for mod, info in addons:
+            module_name = mod.__name__
+            if module_name in used_ext or info["support"] not in support:
+                continue
+            print("    Enabling module ", module_name)
+            bpy.ops.wm.addon_enable(module=module_name)
+
+        # XXX There are currently some problems with bpy/rna...
+        #     *Very* tricky to solve!
+        #     So this is a hack to make all newly added operator visible by
+        #     bpy.types.OperatorProperties.__subclasses__()
+        for cat in dir(bpy.ops):
+            cat = getattr(bpy.ops, cat)
+            for op in dir(cat):
+                getattr(cat, op).get_rna()
+
+    # check for strings like ": %d"
+    ignore = ("%d", "%f", "%s", "%r",  # string formatting
+              "*", ".", "(", ")", "-", "/", "\\", "+", ":", "#", "%"
+              "0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
+              "x",  # used on its own eg: 100x200
+              "X", "Y", "Z", "W",  # used alone. no need to include
+              )
+
+    def filter_message(msg):
+        msg_tmp = msg
+        for ign in ignore:
+            msg_tmp = msg_tmp.replace(ign, "")
+        if not msg_tmp.strip():
+            return True
+        # we could filter out different strings here
+        return False
+
+    if hasattr(collections, 'OrderedDict'):
+        messages = collections.OrderedDict()
+    else:
+        messages = {}
+
+    messages[(CONTEXT_DEFAULT, "")] = []
+
+    # Enable all wanted addons.
+    enable_addons()
+
+    check_ctxt = None
+    if do_checks:
+        check_ctxt = {"multi_rnatip": set(),
+                      "multi_lines": set(),
+                      "py_in_rna": set(),
+                      "not_capitalized": set(),
+                      "end_point": set(),
+                      "undoc_ops": set()}
+
+    # get strings from RNA
+    dump_messages_rna(messages, check_ctxt)
+
+    # get strings from UI layout definitions text="..." args
+    dump_messages_pytext(messages, check_ctxt)
+
+    del messages[(CONTEXT_DEFAULT, "")]
+
+    if do_checks:
+        print("WARNINGS:")
+        keys = set()
+        for c in check_ctxt.values():
+            keys |= c
+        for key in keys:
+            if key in check_ctxt["undoc_ops"]:
+                print("\tThe following operators are undocumented:")
+            else:
+                print("\t“{}”|“{}”:".format(*key))
+                if key in check_ctxt["multi_lines"]:
+                    print("\t\t-> newline in this message!")
+                if key in check_ctxt["not_capitalized"]:
+                    print("\t\t-> message not capitalized!")
+                if key in check_ctxt["end_point"]:
+                    print("\t\t-> message with endpoint!")
+                # XXX Hide this one for now, too much false positives.
+#                if key in check_ctxt["multi_rnatip"]:
+#                    print("\t\t-> tip used in several RNA items")
+                if key in check_ctxt["py_in_rna"]:
+                    print("\t\t-> RNA message also used in py UI code:")
+            print("\t\t{}".format("\n\t\t".join(messages[key])))
+
+    if do_messages:
+        print("Writing messages…")
+        num_written = 0
+        num_filtered = 0
+        with open(FILE_NAME_MESSAGES, 'w', encoding="utf8") as message_file:
+            for (ctx, key), value in messages.items():
+                # filter out junk values
+                if filter_message(key):
+                    num_filtered += 1
+                    continue
+
+                # Remove newlines in key and values!
+                message_file.write("\n".join(COMMENT_PREFIX + msgsrc.replace("\n", "") for msgsrc in value))
+                message_file.write("\n")
+                if ctx:
+                    message_file.write(CONTEXT_PREFIX + ctx.replace("\n", "") + "\n")
+                message_file.write(key.replace("\n", "") + "\n")
+                num_written += 1
+
+        print("Written {} messages to: {} ({} were filtered out)." \
+              "".format(num_written, FILE_NAME_MESSAGES, num_filtered))
+
+
+def main():
+    try:
+        import bpy
+    except ImportError:
+        print("This script must run from inside blender")
+        return
+
+    import sys
+    back_argv = sys.argv
+    sys.argv = sys.argv[sys.argv.index("--") + 1:]
+
+    import argparse
+    parser = argparse.ArgumentParser(description="Process UI messages " \
+                                                 "from inside Blender.")
+    parser.add_argument('-c', '--no_checks', default=True,
+                        action="store_false",
+                        help="No checks over UI messages.")
+    parser.add_argument('-m', '--no_messages', default=True,
+                        action="store_false",
+                        help="No export of UI messages.")
+    parser.add_argument('-o', '--output', help="Output messages file path.")
+    args = parser.parse_args()
+
+    if args.output:
+        global FILE_NAME_MESSAGES
+        FILE_NAME_MESSAGES = args.output
+
+    dump_messages(do_messages=args.no_messages, do_checks=args.no_checks)
+
+    sys.argv = back_argv
+
+
+if __name__ == "__main__":
+    print("\n\n *** Running {} *** \n".format(__file__))
+    main()
diff --git a/release/scripts/modules/i18n/check_po.py b/release/scripts/modules/i18n/check_po.py
new file mode 100755
index 00000000000..a688d38df88
--- /dev/null
+++ b/release/scripts/modules/i18n/check_po.py
@@ -0,0 +1,175 @@
+#!/usr/bin/python3
+
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+# <pep8 compliant>
+
+# Check po’s in branches (or in trunk) for missing/unneeded messages.
+
+import os
+import sys
+from codecs import open
+
+import settings
+import utils
+
+TRUNK_PO_DIR = settings.TRUNK_PO_DIR
+BRANCHES_DIR = settings.BRANCHES_DIR
+
+FILE_NAME_POT = settings.FILE_NAME_POT
+
+
+def print_diff(ref_messages, messages, states):
+    # Remove comments from messages list!
+    messages = set(messages.keys()) - states["comm_msg"]
+    unneeded = (messages - ref_messages)
+    for msgid in unneeded:
+        print('\tUnneeded message id "{}"'.format(msgid))
+
+    missing = (ref_messages - messages)
+    for msgid in missing:
+        print('\tMissing message id "{}"'.format(msgid))
+
+    for msgid in states["comm_msg"]:
+        print('\tCommented message id "{}"'.format(msgid))
+
+    print("\t{} unneeded messages, {} missing messages, {} commented messages." \
+          "".format(len(unneeded), len(missing), len(states["comm_msg"])))
+    return 0
+
+
+def process_po(ref_messages, po, glob_stats, do_stats, do_messages):
+    print("Checking {}...".format(po))
+    ret = 0
+
+    messages, states, stats = utils.parse_messages(po)
+    if do_messages:
+        t = print_diff(ref_messages, messages, states)
+        if t:
+            ret = t
+    if do_stats:
+        print("\tStats:")
+        t = utils.print_stats(stats, glob_stats, prefix="        ")
+        if t:
+            ret = t
+    if states["is_broken"]:
+        print("\tERROR! This .po is broken!")
+        ret = 1
+    return ret
+
+
+def main():
+    import argparse
+    parser = argparse.ArgumentParser(description="Check po’s in branches " \
+                                                 "(or in trunk) for missing" \
+                                                 "/unneeded messages.")
+    parser.add_argument('-s', '--stats', action="store_true",
+                        help="Print po’s stats.")
+    parser.add_argument('-m', '--messages', action="store_true",
+                        help="Print po’s missing/unneeded/commented messages.")
+    parser.add_argument('-t', '--trunk', action="store_true",
+                        help="Check po’s in /trunk/po rather than /branches.")
+    parser.add_argument('-p', '--pot',
+                        help="Specify the .pot file used as reference.")
+    parser.add_argument('langs', metavar='ISO_code', nargs='*',
+                        help="Restrict processed languages to those.")
+    args = parser.parse_args()
+
+
+    if args.pot:
+        global FILE_NAME_POT
+        FILE_NAME_POT = args.pot
+    glob_stats = {"nbr"               : 0.0,
+                  "lvl"               : 0.0,
+                  "lvl_ttips"         : 0.0,
+                  "lvl_trans_ttips"   : 0.0,
+                  "lvl_ttips_in_trans": 0.0,
+                  "lvl_comm"          : 0.0,
+                  "nbr_signs"         : 0,
+                  "nbr_trans_signs"   : 0,
+                  "contexts"          : set()}
+    ret = 0
+
+    pot_messages = None
+    if args.messages:
+        pot_messages, u1, pot_stats = utils.parse_messages(FILE_NAME_POT)
+        pot_messages = set(pot_messages.keys())
+        glob_stats["nbr_signs"] = pot_stats["nbr_signs"]
+
+    if args.langs:
+        for lang in args.langs:
+            if args.trunk:
+                po = os.path.join(TRUNK_PO_DIR, ".".join((lang, "po")))
+            else:
+                po = os.path.join(BRANCHES_DIR, lang, ".".join((lang, "po")))
+            if os.path.exists(po):
+                t = process_po(pot_messages, po, glob_stats,
+                               args.stats, args.messages)
+                if t:
+                    ret = t
+    elif args.trunk:
+        for po in os.listdir(TRUNK_PO_DIR):
+            if po.endswith(".po"):
+                po = os.path.join(TRUNK_PO_DIR, po)
+                t = process_po(pot_messages, po, glob_stats,
+                               args.stats, args.messages)
+                if t:
+                    ret = t
+    else:
+        for lang in os.listdir(BRANCHES_DIR):
+            for po in os.listdir(os.path.join(BRANCHES_DIR, lang)):
+                if po.endswith(".po"):
+                    po = os.path.join(BRANCHES_DIR, lang, po)
+                    t = process_po(pot_messages, po, glob_stats,
+                                   args.stats, args.messages)
+                    if t:
+                        ret = t
+
+    if args.stats and glob_stats["nbr"] != 0.0:
+        nbr_contexts = len(glob_stats["contexts"]-{""})
+        if nbr_contexts != 1:
+            if nbr_contexts == 0:
+                nbr_contexts = "No"
+            _ctx_txt = "s are"
+        else:
+            _ctx_txt = " is"
+        print("\nAverage stats for all {:.0f} processed files:\n" \
+              "    {:>6.1%} done!\n" \
+              "    {:>6.1%} of messages are tooltips.\n" \
+              "    {:>6.1%} of tooltips are translated.\n" \
+              "    {:>6.1%} of translated messages are tooltips.\n" \
+              "    {:>6.1%} of messages are commented.\n" \
+              "    The org msgids are currently made of {} signs.\n" \
+              "    All processed translations are currently made of {} signs.\n" \
+              "    {} specific context{} present:\n            {}\n" \
+              "".format(glob_stats["nbr"], glob_stats["lvl"]/glob_stats["nbr"],
+                        glob_stats["lvl_ttips"]/glob_stats["nbr"],
+                        glob_stats["lvl_trans_ttips"]/glob_stats["nbr"],
+                        glob_stats["lvl_ttips_in_trans"]/glob_stats["nbr"],
+                        glob_stats["lvl_comm"]/glob_stats["nbr"], glob_stats["nbr_signs"],
+                        glob_stats["nbr_trans_signs"], nbr_contexts, _ctx_txt,
+                        "\n            ".join(glob_stats["contexts"]-{""})))
+
+    return ret
+
+
+if __name__ == "__main__":
+    print("\n\n *** Running {} *** \n".format(__file__))
+    print(" *** WARNING! Number of tooltips is only an estimation! ***\n")
+    sys.exit(main())
diff --git a/release/scripts/modules/i18n/clean_po.py b/release/scripts/modules/i18n/clean_po.py
new file mode 100755
index 00000000000..7e91b41065c
--- /dev/null
+++ b/release/scripts/modules/i18n/clean_po.py
@@ -0,0 +1,97 @@
+#!/usr/bin/python3
+
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+# <pep8 compliant>
+
+# Clean (i.e. remove commented messages) po’s in branches or trunk.
+
+import os
+import sys
+import collections
+from codecs import open
+
+import settings
+import utils
+
+TRUNK_PO_DIR = settings.TRUNK_PO_DIR
+BRANCHES_DIR = settings.BRANCHES_DIR
+
+
+def do_clean(po, strict):
+    print("Cleaning {}...".format(po))
+    messages, states, u1 = utils.parse_messages(po)
+
+    if strict and states["is_broken"]:
+        print("ERROR! This .po file is broken!")
+        return 1
+
+    for msgkey in states["comm_msg"]:
+        del messages[msgkey]
+    utils.write_messages(po, messages, states["comm_msg"], states["fuzzy_msg"])
+    print("Removed {} commented messages.".format(len(states["comm_msg"])))
+    return 0
+
+
+def main():
+    import argparse
+    parser = argparse.ArgumentParser(description="Clean po’s in branches " \
+                                                 "or trunk (i.e. remove " \
+                                                 "all commented messages).")
+    parser.add_argument('-t', '--trunk', action="store_true",
+                        help="Clean po’s in trunk rather than branches.")
+    parser.add_argument('-s', '--strict', action="store_true",
+                        help="Raise an error if a po is broken.")
+    parser.add_argument('langs', metavar='ISO_code', nargs='*',
+                        help="Restrict processed languages to those.")
+    args = parser.parse_args()
+
+
+    ret = 0
+
+    if args.langs:
+        for lang in args.langs:
+            if args.trunk:
+                po = os.path.join(TRUNK_PO_DIR, ".".join((lang, "po")))
+            else:
+                po = os.path.join(BRANCHES_DIR, lang, ".".join((lang, "po")))
+            if os.path.exists(po):
+                t = do_clean(po, args.strict)
+                if t:
+                    ret = t
+    elif args.trunk:
+        for po in os.listdir(TRUNK_PO_DIR):
+            if po.endswith(".po"):
+                po = os.path.join(TRUNK_PO_DIR, po)
+                t = do_clean(po, args.strict)
+                if t:
+                    ret = t
+    else:
+        for lang in os.listdir(BRANCHES_DIR):
+            for po in os.listdir(os.path.join(BRANCHES_DIR, lang)):
+                if po.endswith(".po"):
+                    po = os.path.join(BRANCHES_DIR, lang, po)
+                    t = do_clean(po, args.strict)
+                    if t:
+                        ret = t
+
+
+if __name__ == "__main__":
+    print("\n\n *** Running {} *** \n".format(__file__))
+    sys.exit(main())
diff --git a/release/scripts/modules/i18n/import_po_from_branches.py b/release/scripts/modules/i18n/import_po_from_branches.py
new file mode 100755
index 00000000000..4739a98920f
--- /dev/null
+++ b/release/scripts/modules/i18n/import_po_from_branches.py
@@ -0,0 +1,119 @@
+#!/usr/bin/python3
+
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+# <pep8 compliant>
+
+# Import in trunk/po all po from branches translated above the given threshold.
+
+import os
+import shutil
+import sys
+import subprocess
+from codecs import open
+
+import settings
+import utils
+import rtl_preprocess
+
+
+TRUNK_PO_DIR = settings.TRUNK_PO_DIR
+BRANCHES_DIR = settings.BRANCHES_DIR
+
+RTL_PREPROCESS_FILE = settings.RTL_PREPROCESS_FILE
+
+PY3 = settings.PYTHON3_EXEC
+
+
+def main():
+    import argparse
+    parser = argparse.ArgumentParser(description="Import advanced enough po’s " \
+                                                 "from branches to trunk.")
+    parser.add_argument('-t', '--threshold', type=int,
+                        help="Import threshold, as a percentage.")
+    parser.add_argument('-s', '--strict', action="store_true",
+                        help="Raise an error if a po is broken.")
+    parser.add_argument('langs', metavar='ISO_code', nargs='*',
+                        help="Restrict processed languages to those.")
+    args = parser.parse_args()
+
+
+    ret = 0
+
+    threshold = float(settings.IMPORT_MIN_LEVEL)/100.0
+    if args.threshold is not None:
+        threshold = float(args.threshold)/100.0
+
+    for lang in os.listdir(BRANCHES_DIR):
+        if args.langs and lang not in args.langs:
+            continue
+        po = os.path.join(BRANCHES_DIR, lang, ".".join((lang, "po")))
+        if os.path.exists(po):
+            po_is_rtl = os.path.join(BRANCHES_DIR, lang, RTL_PREPROCESS_FILE)
+            msgs, state, stats = utils.parse_messages(po)
+            tot_msgs = stats["tot_msg"]
+            trans_msgs = stats["trans_msg"]
+            lvl = 0.0
+            if tot_msgs:
+                lvl = float(trans_msgs)/float(tot_msgs)
+            if lvl > threshold:
+                if state["is_broken"] and args.strict:
+                    print("{:<10}: {:>6.1%} done, but BROKEN, skipped." \
+                          "".format(lang, lvl))
+                    ret = 1
+                else:
+                    if os.path.exists(po_is_rtl):
+                        out_po = os.path.join(TRUNK_PO_DIR,
+                                              ".".join((lang, "po")))
+                        out_raw_po = os.path.join(TRUNK_PO_DIR,
+                                                  "_".join((lang, "raw.po")))
+                        keys = []
+                        trans = []
+                        for k, m in msgs.items():
+                            keys.append(k)
+                            trans.append("".join(m["msgstr_lines"]))
+                        trans = rtl_preprocess.log2vis(trans)
+                        for k, t in zip(keys, trans):
+                            # Mono-line for now...
+                            msgs[k]["msgstr_lines"] = [t]
+                        utils.write_messages(out_po, msgs, state["comm_msg"],
+                                             state["fuzzy_msg"])
+                        # Also copies org po!
+                        shutil.copy(po, out_raw_po)
+                        print("{:<10}: {:>6.1%} done, enough translated " \
+                              "messages, processed and copied to trunk." \
+                              "".format(lang, lvl))
+                    else:
+                        shutil.copy(po, TRUNK_PO_DIR)
+                        print("{:<10}: {:>6.1%} done, enough translated " \
+                              "messages, copied to trunk.".format(lang, lvl))
+            else:
+                if state["is_broken"] and args.strict:
+                    print("{:<10}: {:>6.1%} done, BROKEN and not enough " \
+                          "translated messages, skipped".format(lang, lvl))
+                    ret = 1
+                else:
+                    print("{:<10}: {:>6.1%} done, not enough translated " \
+                          "messages, skipped.".format(lang, lvl))
+    return ret
+
+
+if __name__ == "__main__":
+    print("\n\n *** Running {} *** \n".format(__file__))
+    sys.exit(main())
diff --git a/release/scripts/modules/i18n/merge_po.py b/release/scripts/modules/i18n/merge_po.py
new file mode 100755
index 00000000000..1a55cd670b0
--- /dev/null
+++ b/release/scripts/modules/i18n/merge_po.py
@@ -0,0 +1,156 @@
+#!/usr/bin/python3
+
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+# <pep8 compliant>
+
+# Merge one or more .po files into the first dest one.
+# If a msgkey is present in more than one merged po, the one in the first file wins, unless 
+# it’s marked as fuzzy and one later is not.
+# The fuzzy flag is removed if necessary.
+# All other comments are never modified.
+# However, commented messages in dst will always remain commented, and commented messages are
+# never merged from sources.
+
+import sys
+from codecs import open
+
+import utils
+
+
+def main():
+    import argparse
+    parser = argparse.ArgumentParser(description="" \
+                    "Merge one or more .po files into the first dest one.\n" \
+                    "If a msgkey (msgid, msgctxt) is present in more than " \
+                    "one merged po, the one in the first file wins, unless " \
+                    "it’s marked as fuzzy and one later is not.\n" \
+                    "The fuzzy flag is removed if necessary.\n" \
+                    "All other comments are never modified.\n" \
+                    "Commented messages in dst will always remain " \
+                    "commented, and commented messages are never merged " \
+                    "from sources.")
+    parser.add_argument('-s', '--stats', action="store_true",
+                        help="Show statistics info.")
+    parser.add_argument('-r', '--replace', action="store_true",
+                        help="Replace existing messages of same \"level\" already in dest po.")
+    parser.add_argument('dst', metavar='dst.po',
+                        help="The dest po into which merge the others.")
+    parser.add_argument('src', metavar='src.po', nargs='+',
+                        help="The po's to merge into the dst.po one.")
+    args = parser.parse_args()
+
+
+    ret = 0
+    done_msgkeys = set()
+    done_fuzzy_msgkeys = set()
+    nbr_merged = 0
+    nbr_replaced = 0
+    nbr_added = 0
+    nbr_unfuzzied = 0
+
+    dst_messages, dst_states, dst_stats = utils.parse_messages(args.dst)
+    if dst_states["is_broken"]:
+        print("Dest po is BROKEN, aborting.")
+        return 1
+    if args.stats:
+        print("Dest po, before merging:")
+        utils.print_stats(dst_stats, prefix="\t")
+    # If we don’t want to replace existing valid translations, pre-populate
+    # done_msgkeys and done_fuzzy_msgkeys.
+    if not args.replace:
+        done_msgkeys =  dst_states["trans_msg"].copy()
+        done_fuzzy_msgkeys = dst_states["fuzzy_msg"].copy()
+    for po in args.src:
+        messages, states, stats = utils.parse_messages(po)
+        if states["is_broken"]:
+            print("\tSrc po {} is BROKEN, skipping.".format(po))
+            ret = 1
+            continue
+        print("\tMerging {}...".format(po))
+        if args.stats:
+            print("\t\tMerged po stats:")
+            utils.print_stats(stats, prefix="\t\t\t")
+        for msgkey, val in messages.items():
+            msgctxt, msgid = msgkey
+            # This msgkey has already been completely merged, or is a commented one,
+            # or the new message is commented, skip it.
+            if msgkey in (done_msgkeys | dst_states["comm_msg"] | states["comm_msg"]):
+                continue
+            is_ttip = utils.is_tooltip(msgid)
+            # New messages does not yet exists in dest.
+            if msgkey not in dst_messages:
+                dst_messages[msgkey] = messages[msgkey]
+                if msgkey in states["fuzzy_msg"]:
+                    done_fuzzy_msgkeys.add(msgkey)
+                    dst_states["fuzzy_msg"].add(msgkey)
+                elif msgkey in states["trans_msg"]:
+                    done_msgkeys.add(msgkey)
+                    dst_states["trans_msg"].add(msgkey)
+                    dst_stats["trans_msg"] += 1
+                    if is_ttip:
+                        dst_stats["trans_ttips"] += 1
+                nbr_added += 1
+                dst_stats["tot_msg"] += 1
+                if is_ttip:
+                    dst_stats["tot_ttips"] += 1
+            # From now on, the new messages is already in dst.
+            # New message is neither translated nor fuzzy, skip it.
+            elif msgkey not in (states["trans_msg"] | states["fuzzy_msg"]):
+                continue
+            # From now on, the new message is either translated or fuzzy!
+            # The new message is translated.
+            elif msgkey in states["trans_msg"]:
+                dst_messages[msgkey]["msgstr_lines"] = messages[msgkey]["msgstr_lines"]
+                done_msgkeys.add(msgkey)
+                done_fuzzy_msgkeys.discard(msgkey)
+                if msgkey in dst_states["fuzzy_msg"]:
+                    dst_states["fuzzy_msg"].remove(msgkey)
+                    nbr_unfuzzied += 1
+                if msgkey not in dst_states["trans_msg"]:
+                    dst_states["trans_msg"].add(msgkey)
+                    dst_stats["trans_msg"] += 1
+                    if is_ttip:
+                        dst_stats["trans_ttips"] += 1
+                else:
+                    nbr_replaced += 1
+                nbr_merged += 1
+            # The new message is fuzzy, org one is fuzzy too,
+            # and this msgkey has not yet been merged.
+            elif msgkey not in (dst_states["trans_msg"] | done_fuzzy_msgkeys):
+                dst_messages[msgkey]["msgstr_lines"] = messages[msgkey]["msgstr_lines"]
+                done_fuzzy_msgkeys.add(msgkey)
+                dst_states["fuzzy_msg"].add(msgkey)
+                nbr_merged += 1
+                nbr_replaced += 1
+
+    utils.write_messages(args.dst, dst_messages, dst_states["comm_msg"], dst_states["fuzzy_msg"])
+
+    print("Merged completed. {} messages were merged (among which {} were replaced), " \
+          "{} were added, {} were \"un-fuzzied\"." \
+          "".format(nbr_merged, nbr_replaced, nbr_added, nbr_unfuzzied))
+    if args.stats:
+        print("Final merged po stats:")
+        utils.print_stats(dst_stats, prefix="\t")
+    return ret
+
+
+if __name__ == "__main__":
+    print("\n\n *** Running {} *** \n".format(__file__))
+    sys.exit(main())
diff --git a/release/scripts/modules/i18n/rtl_preprocess.py b/release/scripts/modules/i18n/rtl_preprocess.py
new file mode 100755
index 00000000000..c6fc5fc787e
--- /dev/null
+++ b/release/scripts/modules/i18n/rtl_preprocess.py
@@ -0,0 +1,231 @@
+#!/usr/bin/python3
+
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+# <pep8 compliant>
+
+# Preprocess right-to-left languages.
+# You can use it either standalone, or through import_po_from_branches or
+# update_trunk.
+#
+# Notes: This has been tested on Linux, not 100% it will work nicely on
+#        Windows or OsX.
+#        This uses ctypes, as there is no py3 binding for fribidi currently.
+#        This implies you only need the compiled C library to run it.
+#        Finally, note that it handles some formating/escape codes (like
+#        \", %s, %x12, %.4f, etc.), protecting them from ugly (evil) fribidi,
+#        which seems completely unaware of such things (as unicode is...).
+
+import sys
+import ctypes
+
+import settings
+import utils
+
+FRIBIDI_LIB = settings.FRIBIDI_LIB
+
+###### Import C library and recreate "defines". #####
+fbd = ctypes.CDLL(FRIBIDI_LIB)
+
+
+#define FRIBIDI_MASK_NEUTRAL	0x00000040L	/* Is neutral */
+FRIBIDI_PAR_ON = 0x00000040
+
+
+#define FRIBIDI_FLAG_SHAPE_MIRRORING	0x00000001
+#define FRIBIDI_FLAG_REORDER_NSM	0x00000002
+
+#define FRIBIDI_FLAG_SHAPE_ARAB_PRES	0x00000100
+#define FRIBIDI_FLAG_SHAPE_ARAB_LIGA	0x00000200
+#define FRIBIDI_FLAG_SHAPE_ARAB_CONSOLE	0x00000400
+
+#define FRIBIDI_FLAG_REMOVE_BIDI	0x00010000
+#define FRIBIDI_FLAG_REMOVE_JOINING	0x00020000
+#define FRIBIDI_FLAG_REMOVE_SPECIALS	0x00040000
+
+#define FRIBIDI_FLAGS_DEFAULT		( \
+#	FRIBIDI_FLAG_SHAPE_MIRRORING	| \
+#	FRIBIDI_FLAG_REORDER_NSM	| \
+#	FRIBIDI_FLAG_REMOVE_SPECIALS	)
+
+#define FRIBIDI_FLAGS_ARABIC		( \
+#	FRIBIDI_FLAG_SHAPE_ARAB_PRES	| \
+#	FRIBIDI_FLAG_SHAPE_ARAB_LIGA	)
+
+FRIBIDI_FLAG_SHAPE_MIRRORING = 0x00000001
+FRIBIDI_FLAG_REORDER_NSM = 0x00000002
+FRIBIDI_FLAG_REMOVE_SPECIALS = 0x00040000
+
+FRIBIDI_FLAG_SHAPE_ARAB_PRES = 0x00000100
+FRIBIDI_FLAG_SHAPE_ARAB_LIGA = 0x00000200
+
+FRIBIDI_FLAGS_DEFAULT = FRIBIDI_FLAG_SHAPE_MIRRORING | \
+                        FRIBIDI_FLAG_REORDER_NSM | \
+                        FRIBIDI_FLAG_REMOVE_SPECIALS
+
+FRIBIDI_FLAGS_ARABIC = FRIBIDI_FLAG_SHAPE_ARAB_PRES | \
+                       FRIBIDI_FLAG_SHAPE_ARAB_LIGA
+
+##### Kernel processing funcs. #####
+def protect_format_seq(msg):
+    """
+    Find some specific escaping/formating sequences (like \", %s, etc.,
+    and protect them from any modification!
+    """
+    LRE = "\u202A"
+    PDF = "\u202C"
+    # Most likely incomplete, but seems to cover current needs.
+    format_codes = set("tslfd")
+    digits = set(".0123456789")
+
+    idx = 0
+    ret = []
+    ln = len(msg)
+    while idx < ln:
+        dlt = 1
+        # \" or \'
+        if idx < (ln - 1) and msg[idx] == '\\' and msg[idx + 1] in "\"\'":
+            dlt = 2
+        # %x12
+        elif idx < (ln - 2) and msg[idx] == '%' and msg[idx + 1] in "x" and \
+             msg[idx + 2] in digits:
+            dlt = 2
+            while (idx + dlt + 1) < ln and msg[idx + dlt + 1] in digits:
+                dlt += 1
+        # %.4f
+        elif idx < (ln - 3) and msg[idx] == '%' and msg[idx + 1] in digits:
+            dlt = 2
+            while (idx + dlt + 1) < ln and msg[idx + dlt + 1] in digits:
+                dlt += 1
+            if (idx + dlt + 1) < ln and msg[idx + dlt + 1] in format_codes:
+                dlt += 1
+            else:
+                dlt = 1
+        # %s
+        elif idx < (ln - 1) and msg[idx] == '%' and \
+             msg[idx + 1] in format_codes:
+            dlt = 2
+
+        if dlt > 1:
+            ret.append(LRE)
+        ret += msg[idx:idx + dlt]
+        idx += dlt
+        if dlt > 1:
+            ret.append(PDF)
+
+    return "".join(ret)
+
+
+def log2vis(msgs):
+    """
+    Globally mimics deprecated fribidi_log2vis.
+    msgs should be an iterable of messages to rtl-process.
+    """
+    for msg in msgs:
+        msg = protect_format_seq(msg)
+
+        fbc_str = ctypes.create_unicode_buffer(msg)
+        ln = len(fbc_str) - 1
+#        print(fbc_str.value, ln)
+        btypes = (ctypes.c_int * ln)()
+        embed_lvl = (ctypes.c_uint8 * ln)()
+        pbase_dir = ctypes.c_int(FRIBIDI_PAR_ON)
+        jtypes = (ctypes.c_uint8 * ln)()
+        flags = FRIBIDI_FLAGS_DEFAULT | FRIBIDI_FLAGS_ARABIC
+
+        # Find out direction of each char.
+        fbd.fribidi_get_bidi_types(fbc_str, ln, ctypes.byref(btypes))
+
+#        print(*btypes)
+
+        fbd.fribidi_get_par_embedding_levels(btypes, ln,
+                                             ctypes.byref(pbase_dir),
+                                             embed_lvl)
+
+#        print(*embed_lvl)
+
+        # Joinings for arabic chars.
+        fbd.fribidi_get_joining_types(fbc_str, ln, jtypes)
+#        print(*jtypes)
+        fbd.fribidi_join_arabic(btypes, ln, embed_lvl, jtypes)
+#        print(*jtypes)
+
+        # Final Shaping!
+        fbd.fribidi_shape(flags, embed_lvl, ln, jtypes, fbc_str)
+
+#        print(fbc_str.value)
+#        print(*(ord(c) for c in fbc_str))
+        # And now, the reordering.
+        # Note that here, we expect a single line, so no need to do
+        # fancy things...
+        fbd.fribidi_reorder_line(flags, btypes, ln, 0, pbase_dir, embed_lvl,
+                                 fbc_str, None)
+#        print(fbc_str.value)
+#        print(*(ord(c) for c in fbc_str))
+
+        yield fbc_str.value
+
+##### Command line stuff. #####
+def main():
+    import argparse
+    parser = argparse.ArgumentParser(description="" \
+                    "Preprocesses right-to-left languages.\n" \
+                    "You can use it either standalone, or through " \
+                    "import_po_from_branches or update_trunk.\n\n" \
+                    "Note: This has been tested on Linux, not 100% it will " \
+                    "work nicely on Windows or OsX.\n" \
+                    "Note: This uses ctypes, as there is no py3 binding for " \
+                    "fribidi currently. This implies you only need the " \
+                    "compiled C library to run it.\n" \
+                    "Note: It handles some formating/escape codes (like " \
+                    "\\\", %s, %x12, %.4f, etc.), protecting them from ugly " \
+                    "(evil) fribidi, which seems completely unaware of such " \
+                    "things (as unicode is...).")
+    parser.add_argument('dst', metavar='dst.po',
+                        help="The dest po into which write the " \
+                             "pre-processed messages.")
+    parser.add_argument('src', metavar='src.po',
+                        help="The po's to pre-process messages.")
+    args = parser.parse_args()
+
+
+    msgs, state, u1 = utils.parse_messages(args.src)
+    if state["is_broken"]:
+        print("Source po is BROKEN, aborting.")
+        return 1
+
+    keys = []
+    trans = []
+    for key, val in msgs.items():
+        keys.append(key)
+        trans.append("".join(val["msgstr_lines"]))
+    trans = log2vis(trans)
+    for key, trn in zip(keys, trans):
+        # Mono-line for now...
+        msgs[key]["msgstr_lines"] = [trn]
+
+    utils.write_messages(args.dst, msgs, state["comm_msg"], state["fuzzy_msg"])
+
+    print("RTL pre-process completed.")
+    return 0
+
+
+if __name__ == "__main__":
+    print("\n\n *** Running {} *** \n".format(__file__))
+    sys.exit(main())
diff --git a/release/scripts/modules/i18n/settings.py b/release/scripts/modules/i18n/settings.py
new file mode 100644
index 00000000000..4b605e439df
--- /dev/null
+++ b/release/scripts/modules/i18n/settings.py
@@ -0,0 +1,263 @@
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+# <pep8 compliant>
+
+# Global settings used by all scripts in this dir.
+# XXX Before any use of the tools in this dir, please make a copy of this file
+#     named "setting.py"
+# XXX This is a template, most values should be OK, but some you’ll have to
+#     edit (most probably, BLENDER_EXEC and SOURCE_DIR).
+
+import os.path
+
+
+###############################################################################
+# MISC
+###############################################################################
+
+# The min level of completeness for a po file to be imported from /branches
+# into /trunk, as a percentage. -1 means "import everything".
+IMPORT_MIN_LEVEL = -1
+
+# The comment prefix used in generated messages.txt file.
+COMMENT_PREFIX = "#~ "
+
+# The comment prefix used to mark sources of msgids, in po's.
+COMMENT_PREFIX_SOURCE = "#: "
+
+# The comment prefix used in generated messages.txt file.
+CONTEXT_PREFIX = "MSGCTXT:"
+
+# Default context.
+CONTEXT_DEFAULT = ""
+
+# Undocumented operator placeholder string.
+UNDOC_OPS_STR = "(undocumented operator)"
+
+# The gettext domain.
+DOMAIN = "blender"
+
+# Our own "gettext" stuff.
+# File type (ext) to parse.
+PYGETTEXT_ALLOWED_EXTS =  {".c", ".cpp", ".cxx", ".hpp", ".hxx", ".h"}
+
+# Where to search contexts definitions, relative to SOURCE_DIR (defined below).
+PYGETTEXT_CONTEXTS_DEFSRC = os.path.join("source", "blender", "blenfont",
+                                         "BLF_translation.h")
+
+# Regex to extract contexts defined in BLF_translation.h
+# XXX Not full-proof, but should be enough here!
+PYGETTEXT_CONTEXTS = "#define\\s+(BLF_I18NCONTEXT_[A-Z_0-9]+)\\s+\"([^\"]*)\""
+
+# Keywords' regex.
+_str_whole_re = ("(?P<{_}>[\"'])(?:[^(?P={_})]|(?<=\\\\)(?P={_})|"
+                 "(?:(?P={_})\\s*\\+?\\s*(?P={_})))+(?P={_})")
+str_clean_re = "(?P<_grp>[\"'])(?P<clean>(?:[^(?P=_grp)]|(?<=\\\\)(?P=_grp))+)(?P=_grp)"
+_ctxt_re = r"(?P<ctxt_raw>(?:" + _str_whole_re.format(_="_ctxt") + r")|(?:[A-Z_0-9]+))"
+_msg_re = r"(?P<msg_raw>" + _str_whole_re.format(_="_msg") + r")"
+PYGETTEXT_KEYWORDS = (() +
+    tuple((r"{}\(\s*" + _msg_re + r"\s*\)").format(it)
+          for it in ("IFACE_", "TIP_", "N_")) +
+    tuple((r"{}\(\s*" + _ctxt_re + r"\s*,\s*"+ _msg_re + r"\s*\)").format(it)
+          for it in ("CTX_IFACE_", "CTX_TIP_", "CTX_N_"))
+)
+#GETTEXT_KEYWORDS = ("IFACE_", "CTX_IFACE_:1c,2", "TIP_", "CTX_TIP_:1c,2",
+#                    "N_", "CTX_N_:1c,2")
+
+# Should po parser warn when finding a first letter not capitalized?
+WARN_MSGID_NOT_CAPITALIZED = True
+
+# Strings that should not raise above warning!
+WARN_MSGID_NOT_CAPITALIZED_ALLOWED = {
+    "",  # Simplifies things... :p
+    "sin(x) / x",
+    "fBM",
+    "sqrt(x*x+y*y+z*z)",
+    "iTaSC",
+    "bItasc",
+    "px",
+    "mm",
+    "fStop",
+    "sRGB",
+    "iso-8859-15",
+    "utf-8",
+    "ascii",
+    "re",
+    "y",
+    "ac3",
+    "flac",
+    "mkv",
+    "mp2",
+    "mp3",
+    "ogg",
+    "wav",
+    "iTaSC parameters",
+    "vBVH",
+    "rv",
+    "en_US",
+    "fr_FR",
+    "it_IT",
+    "ru_RU",
+    "zh_CN",
+    "es",
+    "zh_TW",
+    "ar_EG",
+    "pt",
+    "bg_BG",
+    "ca_AD",
+    "hr_HR",
+    "cs_CZ",
+    "nl_NL",
+    "fi_FI",
+    "de_DE",
+    "el_GR",
+    "id_ID",
+    "ja_JP",
+    "ky_KG",
+    "ko_KR",
+    "ne_NP",
+    "fa_IR",
+    "pl_PL",
+    "ro_RO",
+    "sr_RS",
+    "sr_RS@latin",
+    "sv_SE",
+    "uk_UA",
+    "tr_TR",
+    "hu_HU",
+    "available with",                # Is part of multi-line msg.
+    "virtual parents",               # Is part of multi-line msg.
+    "description",                   # Addons' field. :/
+    "location",                      # Addons' field. :/
+    "author",                        # Addons' field. :/
+    "in memory to enable editing!",  # Is part of multi-line msg.
+    "iScale",
+    "dx",
+    "p0",
+    "res",
+}
+
+
+###############################################################################
+# PATHS
+###############################################################################
+
+# The tools path, should be OK.
+TOOLS_DIR = os.path.join(os.path.dirname(__file__))
+
+# The Python3 executable.You’ll likely have to edit it in your user_settings.py
+# if you’re under Windows.
+PYTHON3_EXEC = "python3"
+
+# The Blender executable!
+# This is just an example, you’ll most likely have to edit it in your
+# user_settings.py!
+BLENDER_EXEC = os.path.abspath(os.path.join(TOOLS_DIR, "..", "..", "..", "..",
+                                            "blender"))
+
+# The xgettext tool. You’ll likely have to edit it in your user_settings.py
+# if you’re under Windows.
+GETTEXT_XGETTEXT_EXECUTABLE = "xgettext"
+
+# The gettext msgmerge tool. You’ll likely have to edit it in your
+# user_settings.py if you’re under Windows.
+GETTEXT_MSGMERGE_EXECUTABLE = "msgmerge"
+
+# The gettext msgfmt "compiler". You’ll likely have to edit it in your
+# user_settings.py if you’re under Windows.
+GETTEXT_MSGFMT_EXECUTABLE = "msgfmt"
+
+# The svn binary... You’ll likely have to edit it in your
+# user_settings.py if you’re under Windows.
+SVN_EXECUTABLE = "svn"
+
+# The FriBidi C compiled library (.so under Linux, .dll under windows...).
+# You’ll likely have to edit it in your user_settings.py if you’re under
+# Windows., e.g. using the included one:
+#     FRIBIDI_LIB = os.path.join(TOOLS_DIR, "libfribidi.dll")
+FRIBIDI_LIB = "libfribidi.so.0"
+
+# The name of the (currently empty) file that must be present in a po's
+# directory to enable rtl-preprocess.
+RTL_PREPROCESS_FILE = "is_rtl"
+
+# The Blender source root path.
+# This is just an example, you’ll most likely have to override it in your
+# user_settings.py!
+SOURCE_DIR = os.path.abspath(os.path.join(TOOLS_DIR, "..", "..", "..", "..",
+                                          "..", "..", "blender_msgs"))
+
+# The bf-translation repository (you'll likely have to override this in your
+# user_settings.py).
+I18N_DIR = os.path.abspath(os.path.join(TOOLS_DIR, "..", "..", "..", "..",
+                                        "..", "..", "i18n"))
+
+# The /branches path (overriden in bf-translation's i18n_override_settings.py).
+BRANCHES_DIR = os.path.join(I18N_DIR, "branches")
+
+# The /trunk path (overriden in bf-translation's i18n_override_settings.py).
+TRUNK_DIR = os.path.join(I18N_DIR, "trunk")
+
+# The /trunk/po path (overriden in bf-translation's i18n_override_settings.py).
+TRUNK_PO_DIR = os.path.join(TRUNK_DIR, "po")
+
+# The /trunk/mo path (overriden in bf-translation's i18n_override_settings.py).
+TRUNK_MO_DIR = os.path.join(TRUNK_DIR, "locale")
+
+# The file storing Blender-generated messages.
+FILE_NAME_MESSAGES = os.path.join(TRUNK_PO_DIR, "messages.txt")
+
+# The Blender source path to check for i18n macros.
+POTFILES_SOURCE_DIR = os.path.join(SOURCE_DIR, "source")
+
+# The "source" file storing which files should be processed by xgettext,
+# used to create FILE_NAME_POTFILES
+FILE_NAME_SRC_POTFILES = os.path.join(TRUNK_PO_DIR, "_POTFILES.in")
+
+# The final (generated) file storing which files
+# should be processed by xgettext.
+FILE_NAME_POTFILES = os.path.join(TRUNK_PO_DIR, "POTFILES.in")
+
+# The template messages file.
+FILE_NAME_POT = os.path.join(TRUNK_PO_DIR, ".".join((DOMAIN, "pot")))
+
+# Other py files that should be searched for ui strings, relative to SOURCE_DIR.
+# Needed for Cycles, currently...
+CUSTOM_PY_UI_FILES = [os.path.join("intern", "cycles", "blender",
+                                   "addon", "ui.py"),
+                     ]
+
+
+# A cache storing validated msgids, to avoid re-spellchecking them.
+SPELL_CACHE = os.path.join("/tmp", ".spell_cache")
+
+
+# Custom override settings must be one dir above i18n tools itself!
+import sys
+sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
+try:
+    from i18n_override_settings import *
+except ImportError:  # If no i18n_override_settings available, it’s no error!
+    pass
+
+# Override with custom user settings, if available.
+try:
+    from user_settings import *
+except ImportError:  # If no user_settings available, it’s no error!
+    pass
diff --git a/release/scripts/modules/i18n/spell_check_utils.py b/release/scripts/modules/i18n/spell_check_utils.py
new file mode 100644
index 00000000000..3999c01a896
--- /dev/null
+++ b/release/scripts/modules/i18n/spell_check_utils.py
@@ -0,0 +1,490 @@
+# ##### BEGIN GPL LICENSE BLOCK #####
+#
+#  This program is free software; you can redistribute it and/or
+#  modify it under the terms of the GNU General Public License
+#  as published by the Free Software Foundation; either version 2
+#  of the License, or (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software Foundation,
+#  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ##### END GPL LICENSE BLOCK #####
+
+# <pep8 compliant>
+
+import re
+
+
+_valid_before = "(?<=[\\s*'\"`])|(?<=[a-zA-Z][/-])|(?<=^)"
+_valid_after = "(?=[\\s'\"`.!?,;:])|(?=[/-]\\s*[a-zA-Z])|(?=$)"
+_valid_words = "(?:{})(?:(?:[A-Z]+[a-z]*)|[A-Z]*|[a-z]*)(?:{})".format(_valid_before, _valid_after)
+_reg = re.compile(_valid_words)
+
+
+def split_words(text):
+    return [w for w in _reg.findall(text) if w]
+
+
+# These must be all lower case for comparisons
+dict_uimsgs = {
+    # OK words
+    "aren",  # aren't
+    "betweens",  # yuck! in-betweens!
+    "boolean", "booleans",
+    "decrement",
+    "doesn",  # doesn't
+    "fader",
+    "hoc",  # ad-hoc
+    "indices",
+    "iridas",
+    "isn",  # isn't
+    "iterable",
+    "kyrgyz",
+    "latin",
+    "merchantability",
+    "mplayer",
+    "vertices",
+
+    # Merged words
+    "addon", "addons",
+    "antialiasing",
+    "arcsine", "arccosine", "arctangent",
+    "autoclip",
+    "autocomplete",
+    "autoname",
+    "autosave",
+    "autoscale",
+    "autosmooth",
+    "autosplit",
+    "backface",
+    "backimage",
+    "backscattered",
+    "bandnoise",
+    "bindcode",
+    "bitrate",
+    "blendin",
+    "bonesize",
+    "boundbox",
+    "boxpack",
+    "buffersize",
+    "builtin", "builtins",
+    "chunksize",
+    "de",
+    "defocus",
+    "denoise",
+    "despill", "despilling",
+    "filebrowser",
+    "filelist",
+    "filename", "filenames",
+    "filepath", "filepaths",
+    "forcefield", "forcefields",
+    "fulldome", "fulldomes",
+    "fullscreen",
+    "gridline",
+    "hemi",
+    "inscatter",
+    "lightless",
+    "lookup", "lookups",
+    "mathutils",
+    "midlevel",
+    "midground",
+    "mixdown",
+    "multi",
+    "multifractal",
+    "multires", "multiresolution",
+    "multisampling",
+    "multitexture",
+    "namespace",
+    "keyconfig",
+    "playhead",
+    "polyline",
+    "popup", "popups",
+    "pre",
+    "precalculate",
+    "prefetch",
+    "premultiply", "premultiplied",
+    "prepass",
+    "prepend",
+    "preprocess", "preprocessing",
+    "preseek",
+    "readonly",
+    "realtime",
+    "rekey",
+    "remesh",
+    "reprojection",
+    "resize",
+    "restpose",
+    "retarget", "retargets", "retargeting", "retargeted",
+    "ringnoise",
+    "rolloff",
+    "screencast", "screenshot", "screenshots",
+    "selfcollision",
+    "singletexture",
+    "startup",
+    "stateful",
+    "starfield",
+    "subflare", "subflares",
+    "subframe", "subframes",
+    "subclass", "subclasses", "subclassing",
+    "subdirectory", "subdirectories", "subdir", "subdirs",
+    "submodule", "submodules",
+    "subpath",
+    "subsize",
+    "substep", "substeps",
+    "targetless",
+    "textbox", "textboxes",
+    "tilemode",
+    "timestamp", "timestamps",
+    "timestep", "timesteps",
+    "un",
+    "unbake",
+    "uncomment",
+    "undeformed",
+    "undistort",
+    "ungroup",
+    "unhide",
+    "unindent",
+    "unkeyed",
+    "unpremultiply",
+    "unprojected",
+    "unreacted",
+    "unregister",
+    "unselected",
+    "unsubdivided",
+    "unshadowed",
+    "unspill",
+    "unstitchable",
+    "vectorscope",
+    "worldspace",
+    "workflow",
+
+    # Neologisms, slangs
+    "automagic", "automagically",
+    "blobby",
+    "blockiness", "blocky",
+    "collider", "colliders",
+    "deformer", "deformers",
+    "editability",
+    "keyer",
+    "lacunarity",
+    "numerics",
+    "occluder",
+    "passepartout",
+    "perspectively",
+    "polygonization",
+    "selectability",
+    "slurph",
+    "trackability",
+    "transmissivity",
+    "rasterized", "rasterization",
+    "renderer", "renderable", "renderability",
+
+    # Abbreviations
+    "aero",
+    "amb",
+    "anim",
+    "bool",
+    "calc",
+    "config", "configs",
+    "const",
+    "coord", "coords",
+    "dof",
+    "dupli", "duplis",
+    "eg",
+    "esc",
+    "fac",
+    "grless",
+    "http",
+    "init",
+    "kbit",
+    "lensdist",
+    "loc", "rot", "pos",
+    "lorem",
+    "luma",
+    "multicam",
+    "num",
+    "ok",
+    "ortho",
+    "persp",
+    "pref", "prefs",
+    "prev",
+    "param",
+    "premul",
+    "quad", "quads",
+    "quat", "quats",
+    "recalc", "recalcs",
+    "refl",
+    "spec",
+    "struct", "structs",
+    "tex",
+    "tri", "tris",
+    "uv", "uvs", "uvw", "uw", "uvmap",
+    "vec",
+    "vert", "verts",
+    "vis",
+    "xyz", "xzy", "yxz", "yzx", "zxy", "zyx",
+    "xy", "xz", "yx", "yz", "zx", "zy",
+
+    # General computer/science terms
+    "boid", "boids",
+    "equisolid",
+    "euler", "eulers",
+    "hashable",
+    "intrinsics",
+    "isosurface",
+    "jitter", "jittering", "jittered",
+    "keymap", "keymaps",
+    "lambertian",
+    "laplacian",
+    "metadata",
+    "nand", "xnor",
+    "normals",
+    "numpad",
+    "octree",
+    "opengl",
+    "pulldown", "pulldowns",
+    "quantized",
+    "samplerate",
+    "scrollback",
+    "scrollbar",
+    "scroller",
+    "searchable",
+    "spacebar",
+    "tooltip", "tooltips",
+    "trackpad",
+    "unicode",
+    "viewport", "viewports",
+    "viscoelastic",
+    "wildcard", "wildcards",
+
+    # General computer graphics terms
+    "anaglyph",
+    "bezier", "beziers",
+    "bicubic",
+    "bilinear",
+    "blackpoint", "whitepoint",
+    "blinn",
+    "bokeh",
+    "catadioptric",
+    "centroid",
+    "chrominance",
+    "codec", "codecs",
+    "collada",
+    "compositing",
+    "crossfade",
+    "deinterlace",
+    "dropoff",
+    "eigenvectors",
+    "equirectangular",
+    "fisheye",
+    "framerate",
+    "gimbal",
+    "grayscale",
+    "icosphere",
+    "lightmap",
+    "lossless", "lossy",
+    "midtones",
+    "mipmap", "mipmaps", "mip",
+    "ngon", "ngons",
+    "nurb", "nurbs",
+    "perlin",
+    "phong",
+    "radiosity",
+    "raytrace", "raytracing", "raytraced",
+    "renderfarm",
+    "shader", "shaders",
+    "specular", "specularity",
+    "spillmap",
+    "sobel",
+    "tonemap",
+    "toon",
+    "timecode",
+    "voronoi",
+    "voxel", "voxels",
+    "wireframe",
+    "zmask",
+    "ztransp",
+
+    # Blender terms
+    "bbone",
+    "breakdowner",
+    "bspline",
+    "bweight",
+    "datablock", "datablocks",
+    "dopesheet",
+    "dupliface", "duplifaces",
+    "dupliframe", "dupliframes",
+    "dupliobject", "dupliob",
+    "dupligroup",
+    "duplivert",
+    "fcurve", "fcurves",
+    "fluidsim",
+    "frameserver",
+    "enum",
+    "keyframe", "keyframes", "keyframing", "keyframed",
+    "metaball", "metaballs",
+    "metaelement", "metaelements",
+    "metastrip", "metastrips",
+    "movieclip",
+    "nabla",
+    "navmesh",
+    "outliner",
+    "paintmap", "paintmaps",
+    "polygroup", "polygroups",
+    "poselib",
+    "pushpull",
+    "pyconstraint", "pyconstraints",
+    "shapekey", "shapekeys",
+    "shrinkfatten",
+    "shrinkwrap",
+    "softbody",
+    "stucci",
+    "sunsky",
+    "subsurf",
+    "texface",
+    "timeline", "timelines",
+    "tosphere",
+    "vcol", "vcols",
+    "vgroup", "vgroups",
+    "vinterlace",
+    "wetmap", "wetmaps",
+    "wpaint",
+
+    # Algorithm names
+    "beckmann",
+    "catmull",
+    "catrom",
+    "chebychev",
+    "kutta",
+    "lennard",
+    "minkowsky",
+    "minnaert",
+    "musgrave",
+    "nayar",
+    "netravali",
+    "oren",
+    "prewitt",
+    "runge",
+    "verlet",
+    "worley",
+
+    # Acronyms
+    "aa", "msaa",
+    "api",
+    "asc", "cdl",
+    "ascii",
+    "atrac",
+    "bw",
+    "ccd",
+    "cmd",
+    "cpus",
+    "ctrl",
+    "cw", "ccw",
+    "dev",
+    "djv",
+    "dpi",
+    "dvar",
+    "dx",
+    "fh",
+    "fov",
+    "fft",
+    "gfx",
+    "gl",
+    "glsl",
+    "gpl",
+    "gpu", "gpus",
+    "hc",
+    "hdr",
+    "hh", "mm", "ss", "ff", # hh:mm:ss:ff timecode
+    "hsv", "hsva",
+    "id",
+    "itu",
+    "lhs",
+    "lmb", "mmb", "rmb",
+    "mux",
+    "ndof",
+    "ppc",
+    "px",
+    "qmc",
+    "rgb", "rgba",
+    "rhs",
+    "rv",
+    "sdl",
+    "sl",
+    "smpte",
+    "svn",
+    "ui",
+    "unix",
+    "vbo", "vbos",
+    "ycc", "ycca",
+    "yuv", "yuva",
+
+    # Blender acronyms
+    "bge",
+    "bli",
+    "bvh",
+    "dbvt",
+    "dop",  # BLI K-Dop BVH
+    "ik",
+    "nla",
+    "qbvh",
+    "rna",
+    "rvo",
+    "simd",
+    "sph",
+    "svbvh",
+
+    # CG acronyms
+    "ao",
+    "bsdf",
+    "ior",
+    "mocap",
+
+    # Files types/formats
+    "avi",
+    "attrac",
+    "autodesk",
+    "bmp",
+    "btx",
+    "cineon",
+    "dpx",
+    "dxf",
+    "eps",
+    "exr",
+    "fbx",
+    "ffmpeg",
+    "flac",
+    "gzip",
+    "ico",
+    "jpg", "jpeg",
+    "matroska",
+    "mdd",
+    "mkv",
+    "mpeg", "mjpeg",
+    "mtl",
+    "ogg",
+    "openjpeg",
+    "piz",
+    "png",
+    "po",
+    "quicktime",
+    "rle",
+    "sgi",
+    "stl",
+    "svg",
+    "targa", "tga",
+    "tiff",
+    "theora",
+    "vorbis",
+    "wav",
+    "xiph",
+    "xml",
+    "xna",
+    "xvid",
+}
diff --git a/release/scripts/modules/i18n/update_branches.py b/release/scripts/modules/i18n/update_branches.py
new file mode 100755
index 00000000000..1a856b14944
--- /dev/null
+++ b/release/scripts/modules/i18n/update_branches.py
@@ -0,0 +1,104 @@
+#!/usr/bin/python3
+
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+# <pep8 compliant>
+
+# Update all branches:
+# * Generate a temp messages.txt file.
+# * Use it to generate a temp .pot file.
+# * Use it to update all .po’s in /branches.
+
+import subprocess
+import os
+import sys
+import tempfile
+
+import settings
+
+PY3 = settings.PYTHON3_EXEC
+
+def main():
+    import argparse
+    parser = argparse.ArgumentParser(description="" \
+                                 "Update all branches:\n" \
+                                 "* Generate a temp messages.txt file.\n" \
+                                 "* Use it to generate a temp .pot file.\n" \
+                                 "* Use it to update all .po’s in /branches.")
+    parser.add_argument('--pproc-contexts', action="store_true",
+                        help="Pre-process po’s to avoid having plenty of "
+                             "fuzzy msgids just because a context was "
+                             "added/changed!")
+    parser.add_argument('-c', '--no_checks', default=True,
+                        action="store_false",
+                        help="No checks over UI messages.")
+    parser.add_argument('-a', '--add', action="store_true",
+                        help="Add missing po’s (useful only when one or " \
+                             "more languages are given!).")
+    parser.add_argument('langs', metavar='ISO_code', nargs='*',
+                        help="Restrict processed languages to those.")
+    args = parser.parse_args()
+
+
+    ret = 0
+
+    # Generate a temp messages file.
+    dummy, msgfile = tempfile.mkstemp(suffix=".txt",
+                                      prefix="blender_messages_")
+    os.close(dummy)
+    cmd = (PY3, "./update_msg.py", "-o", msgfile)
+    t = subprocess.call(cmd)
+    if t:
+        ret = t
+
+    # Regenerate POTFILES.in.
+#    cmd = (PY3, "./update_potinput.py")
+#    t = subprocess.call(cmd)
+#    if t:
+#        ret = t
+
+    # Generate a temp pot file.
+    dummy, potfile = tempfile.mkstemp(suffix=".pot",
+                                      prefix="blender_pot_")
+    os.close(dummy)
+    cmd = [PY3, "./update_pot.py", "-i", msgfile, "-o", potfile]
+    if not args.no_checks:
+        cmd.append("-c")
+    t = subprocess.call(cmd)
+    if t:
+        ret = t
+
+    # Update branches’ po files.
+    cmd = [PY3, "./update_po.py", "-i", potfile]
+    if args.langs:
+        if args.add:
+            cmd.append("-a")
+        cmd += args.langs
+    if args.pproc_contexts:
+        cmd.append("--pproc-contexts")
+    t = subprocess.call(cmd)
+    if t:
+        ret = t
+
+    return ret
+
+
+if __name__ == "__main__":
+    print("\n\n *** Running {} *** \n".format(__file__))
+    sys.exit(main())
diff --git a/release/scripts/modules/i18n/update_mo.py b/release/scripts/modules/i18n/update_mo.py
new file mode 100755
index 00000000000..9804eb8ce34
--- /dev/null
+++ b/release/scripts/modules/i18n/update_mo.py
@@ -0,0 +1,91 @@
+#!/usr/bin/python3
+
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+# <pep8 compliant>
+
+# Create or update mo’s under /trunk/locale/…
+
+import subprocess
+import os
+import sys
+
+import settings
+import utils
+
+
+GETTEXT_MSGFMT_EXECUTABLE = settings.GETTEXT_MSGFMT_EXECUTABLE
+
+SOURCE_DIR = settings.SOURCE_DIR
+TRUNK_MO_DIR = settings.TRUNK_MO_DIR
+TRUNK_PO_DIR = settings.TRUNK_PO_DIR
+
+DOMAIN = settings.DOMAIN
+
+
+def process_po(po, lang):
+    mo_dir = os.path.join(TRUNK_MO_DIR, lang, "LC_MESSAGES")
+
+    # Create dirs if not existing!
+    os.makedirs(mo_dir, exist_ok = True)
+    # show stats
+    cmd = (GETTEXT_MSGFMT_EXECUTABLE,
+        "--statistics",
+        po,
+        "-o",
+        os.path.join(mo_dir, ".".join((DOMAIN, "mo"))),
+        )
+
+    print("Running ", " ".join(cmd))
+    ret = subprocess.call(cmd)
+    print("Finished.")
+    return ret
+
+
+def main():
+    import argparse
+    parser = argparse.ArgumentParser(description="Create or update mo’s " \
+                                                 "under {}.".format(TRUNK_MO_DIR))
+    parser.add_argument('langs', metavar='ISO_code', nargs='*',
+                        help="Restrict processed languages to those.")
+    args = parser.parse_args()
+
+    ret = 0
+
+    if args.langs:
+        for lang in args.langs:
+            po = os.path.join(TRUNK_PO_DIR, ".".join((lang, "po")))
+            if os.path.exists(po):
+                t = process_po(po, lang)
+                if t:
+                    ret = t
+    else:
+        for po in os.listdir(TRUNK_PO_DIR):
+            if po.endswith(".po") and not po.endswith("_raw.po"):
+                lang = os.path.basename(po)[:-3]
+                po = os.path.join(TRUNK_PO_DIR, po)
+                t = process_po(po, lang)
+                if t:
+                    ret = t
+    return ret
+
+
+if __name__ == "__main__":
+    print("\n\n *** Running {} *** \n".format(__file__))
+    sys.exit(main())
diff --git a/release/scripts/modules/i18n/update_msg.py b/release/scripts/modules/i18n/update_msg.py
new file mode 100755
index 00000000000..e5154632cfe
--- /dev/null
+++ b/release/scripts/modules/i18n/update_msg.py
@@ -0,0 +1,69 @@
+#!/usr/bin/python3
+
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+# <pep8-80 compliant>
+
+# Write out messages.txt from Blender.
+
+import os
+import sys
+import subprocess
+
+import settings
+
+
+BLENDER_ARGS = [
+    settings.BLENDER_EXEC,
+    "--background",
+    "--factory-startup",
+    "--python",
+    os.path.join(settings.TOOLS_DIR, "bl_process_msg.py"),
+    "--",
+    "-m",
+]
+
+
+def main():
+    import argparse
+    parser = argparse.ArgumentParser(description="Write out messages.txt " \
+                                                 "from Blender.")
+    parser.add_argument('-c', '--no_checks', default=True,
+                        action="store_false",
+                        help="No checks over UI messages.")
+    parser.add_argument('-b', '--blender', help="Blender executable path.")
+    parser.add_argument('-o', '--output', help="Output messages file path.")
+    args = parser.parse_args()
+    if args.blender:
+        BLENDER_ARGS[0] = args.blender
+    if not args.no_checks:
+        BLENDER_ARGS.append("-c")
+    if args.output:
+        BLENDER_ARGS.append("-o")
+        BLENDER_ARGS.append(args.output)
+    ret = subprocess.call(BLENDER_ARGS)
+
+    return ret
+
+
+if __name__ == "__main__":
+    print("\n\n *** Running {} *** \n".format(__file__))
+    ret = main()
+    if ret:
+        raise(Exception(ret))
diff --git a/release/scripts/modules/i18n/update_po.py b/release/scripts/modules/i18n/update_po.py
new file mode 100755
index 00000000000..042b46c03f2
--- /dev/null
+++ b/release/scripts/modules/i18n/update_po.py
@@ -0,0 +1,166 @@
+#!/usr/bin/python3
+
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+# <pep8 compliant>
+
+# Update po’s in the branches from blender.pot in /trunk/po dir.
+
+import subprocess
+import os
+import sys
+from codecs import open
+import shutil
+
+import settings
+import utils
+
+GETTEXT_MSGMERGE_EXECUTABLE = settings.GETTEXT_MSGMERGE_EXECUTABLE
+BRANCHES_DIR  = settings.BRANCHES_DIR
+TRUNK_PO_DIR  = settings.TRUNK_PO_DIR
+FILE_NAME_POT = settings.FILE_NAME_POT
+
+
+def pproc_newcontext_po(po, pot_messages, pot_stats):
+    print("Adding new contexts to {}...".format(po))
+    messages, state, stats = utils.parse_messages(po)
+    known_ctxt = stats["contexts"]
+    print("Already known (present) context(s): {}".format(str(known_ctxt)))
+
+    new_ctxt = set()
+    added = 0
+    # Only use valid already translated messages!
+    allowed_keys = state["trans_msg"] - state["fuzzy_msg"] - state["comm_msg"]
+    for key in pot_messages.keys():
+        ctxt, msgid = key
+        if ctxt in known_ctxt:
+            continue
+        new_ctxt.add(ctxt)
+        for t_ctxt in known_ctxt:
+            # XXX The first match will win, this might not be optimal...
+            t_key = (t_ctxt, msgid)
+            if t_key in allowed_keys:
+                # Wrong comments (sources) will be removed by msgmerge...
+                messages[key] = messages[t_key]
+                messages[key]["msgctxt_lines"] = [ctxt]
+                added += 1
+
+    utils.write_messages(po, messages, state["comm_msg"], state["fuzzy_msg"])
+    print("Finished!\n    {} new context(s) was/were added {}, adding {} new "
+          "messages.\n".format(len(new_ctxt), str(new_ctxt), added))
+    return 0
+
+
+def process_po(po, lang):
+    # update po file
+    cmd = (GETTEXT_MSGMERGE_EXECUTABLE,
+           "--update",
+           "--no-wrap",
+           "--backup=none",
+           "--lang={}".format(lang),
+           po,
+           FILE_NAME_POT,
+           )
+
+    print("Updating {}...".format(po))
+    print("Running ", " ".join(cmd))
+    ret = subprocess.call(cmd)
+    print("Finished!\n")
+    return ret
+
+
+def main():
+    import argparse
+    parser = argparse.ArgumentParser(description="Write out messages.txt "
+                                                 "from Blender.")
+    parser.add_argument('-t', '--trunk', action="store_true",
+                        help="Update po’s in /trunk/po rather than /branches.")
+    parser.add_argument('-i', '--input', metavar="File",
+                        help="Input pot file path.")
+    parser.add_argument('--pproc-contexts', action="store_true",
+                        help="Pre-process po’s to avoid having plenty of "
+                             "fuzzy msgids just because a context was "
+                             "added/changed!")
+    parser.add_argument('-a', '--add', action="store_true",
+                        help="Add missing po’s (useful only when one or "
+                             "more languages are given!).")
+    parser.add_argument('langs', metavar='ISO_code', nargs='*',
+                        help="Restrict processed languages to those.")
+    args = parser.parse_args()
+
+    if args.input:
+        global FILE_NAME_POT
+        FILE_NAME_POT = args.input
+    ret = 0
+
+    if args.pproc_contexts:
+        _ctxt_proc = pproc_newcontext_po
+        pot_messages, _a, pot_stats = utils.parse_messages(FILE_NAME_POT)
+    else:
+        _ctxt_proc = lambda a, b, c: 0
+        pot_messages, pot_stats = None, None
+
+    if args.langs:
+        for lang in args.langs:
+            if args.trunk:
+                dr = TRUNK_PO_DIR
+                po = os.path.join(dr, ".".join((lang, "po")))
+            else:
+                dr = os.path.join(BRANCHES_DIR, lang)
+                po = os.path.join(dr, ".".join((lang, "po")))
+            if args.add:
+                if not os.path.exists(dr):
+                    os.makedirs(dr)
+                if not os.path.exists(po):
+                    shutil.copy(FILE_NAME_POT, po)
+            if args.add or os.path.exists(po):
+                t = _ctxt_proc(po, pot_messages, pot_stats)
+                if t:
+                    ret = t
+                t = process_po(po, lang)
+                if t:
+                    ret = t
+    elif args.trunk:
+        for po in os.listdir(TRUNK_PO_DIR):
+            if po.endswith(".po"):
+                lang = os.path.basename(po)[:-3]
+                po = os.path.join(TRUNK_PO_DIR, po)
+                t = _ctxt_proc(po, pot_messages, pot_stats)
+                if t:
+                    ret = t
+                t = process_po(po, lang)
+                if t:
+                    ret = t
+    else:
+        for lang in os.listdir(BRANCHES_DIR):
+            po = os.path.join(BRANCHES_DIR, lang, ".".join((lang, "po")))
+            if os.path.exists(po):
+                t = _ctxt_proc(po, pot_messages, pot_stats)
+                if t:
+                    ret = t
+                t = process_po(po, lang)
+                if t:
+                    ret = t
+
+    return ret
+
+
+if __name__ == "__main__":
+    print("\n\n *** Running {} *** \n".format(__file__))
+    sys.exit(main())
diff --git a/release/scripts/modules/i18n/update_pot.py b/release/scripts/modules/i18n/update_pot.py
new file mode 100755
index 00000000000..ceef51aa072
--- /dev/null
+++ b/release/scripts/modules/i18n/update_pot.py
@@ -0,0 +1,314 @@
+#!/usr/bin/python3
+
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+# <pep8 compliant>
+
+# Update blender.pot file from messages.txt
+
+import subprocess
+import os
+import sys
+import re
+#from codecs import open
+import tempfile
+import argparse
+import time
+import pickle
+
+import settings
+import utils
+
+
+COMMENT_PREFIX = settings.COMMENT_PREFIX
+COMMENT_PREFIX_SOURCE = settings.COMMENT_PREFIX_SOURCE
+CONTEXT_PREFIX = settings.CONTEXT_PREFIX
+FILE_NAME_MESSAGES = settings.FILE_NAME_MESSAGES
+#FILE_NAME_POTFILES = settings.FILE_NAME_POTFILES
+FILE_NAME_POT = settings.FILE_NAME_POT
+SOURCE_DIR = settings.SOURCE_DIR
+POTFILES_DIR = settings.POTFILES_SOURCE_DIR
+SRC_POTFILES = settings.FILE_NAME_SRC_POTFILES
+
+#GETTEXT_XGETTEXT_EXECUTABLE = settings.GETTEXT_XGETTEXT_EXECUTABLE
+#GETTEXT_KEYWORDS = settings.GETTEXT_KEYWORDS
+CONTEXT_DEFAULT = settings.CONTEXT_DEFAULT
+PYGETTEXT_ALLOWED_EXTS = settings.PYGETTEXT_ALLOWED_EXTS
+
+SVN_EXECUTABLE = settings.SVN_EXECUTABLE
+
+WARN_NC = settings.WARN_MSGID_NOT_CAPITALIZED
+NC_ALLOWED = settings.WARN_MSGID_NOT_CAPITALIZED_ALLOWED
+
+SPELL_CACHE = settings.SPELL_CACHE
+
+
+#def generate_valid_potfiles(final_potfiles):
+#    "Generates a temp potfiles.in with aboslute paths."
+#    with open(FILE_NAME_POTFILES, 'r', 'utf-8') as f, \
+#         open(final_potfiles, 'w', 'utf-8') as w:
+#        for line in f:
+#            line = utils.stripeol(line)
+#            if line:
+#                w.write("".join((os.path.join(SOURCE_DIR,
+#                                              os.path.normpath(line)), "\n")))
+
+# Do this only once!
+# Get contexts defined in blf.
+CONTEXTS = {}
+with open(os.path.join(SOURCE_DIR, settings.PYGETTEXT_CONTEXTS_DEFSRC)) as f:
+    reg = re.compile(settings.PYGETTEXT_CONTEXTS)
+    f = f.read()
+    # This regex is supposed to yield tuples
+    # (key=C_macro_name, value=C_string).
+    CONTEXTS = dict(m.groups() for m in reg.finditer(f))
+
+# Build regexes to extract messages (with optinal contexts) from C source.
+pygettexts = tuple(re.compile(r).search
+                   for r in settings.PYGETTEXT_KEYWORDS)
+_clean_str = re.compile(settings.str_clean_re).finditer
+clean_str = lambda s: "".join(m.group("clean") for m in _clean_str(s))
+
+def check_file(path, rel_path, messages):
+    with open(path, encoding="utf-8") as f:
+        f = f.read()
+        for srch in pygettexts:
+            m = srch(f)
+            line = pos =0
+            while m:
+                d = m.groupdict()
+                # Context.
+                ctxt = d.get("ctxt_raw")
+                if ctxt:
+                    if ctxt in CONTEXTS:
+                        ctxt = CONTEXTS[ctxt]
+                    elif '"' in ctxt or "'" in ctxt:
+                        ctxt = clean_str(ctxt)
+                    else:
+                        print("WARNING: raw context “{}” couldn’t be resolved!"
+                              "".format(ctxt))
+                        ctxt = CONTEXT_DEFAULT
+                else:
+                    ctxt = CONTEXT_DEFAULT
+                # Message.
+                msg = d.get("msg_raw")
+                if msg:
+                    if '"' in msg or "'" in msg:
+                        msg = clean_str(msg)
+                    else:
+                        print("WARNING: raw message “{}” couldn’t be resolved!"
+                              "".format(msg))
+                        msg = ""
+                else:
+                    msg = ""
+                # Line.
+                line += f[pos:m.start()].count('\n')
+                # And we are done for this item!
+                messages.setdefault((ctxt, msg), []).append(":".join((rel_path, str(line))))
+                pos = m.end()
+                line += f[m.start():pos].count('\n')
+                m = srch(f, pos)
+
+
+def py_xgettext(messages):
+    with open(SRC_POTFILES) as src:
+        forbidden = set()
+        forced = set()
+        for l in src:
+            if l[0] == '-':
+                forbidden.add(l[1:].rstrip('\n'))
+            elif l[0] != '#':
+                forced.add(l.rstrip('\n'))
+        for root, dirs, files in os.walk(POTFILES_DIR):
+            if "/.svn" in root:
+                continue
+            for fname in files:
+                if os.path.splitext(fname)[1] not in PYGETTEXT_ALLOWED_EXTS:
+                    continue
+                path = os.path.join(root, fname)
+                rel_path = os.path.relpath(path, SOURCE_DIR)
+                if rel_path in forbidden | forced:
+                    continue
+                check_file(path, rel_path, messages)
+        for path in forced:
+            if os.path.exists(path):
+                check_file(os.path.join(SOURCE_DIR, path), path, messages)
+
+
+# Spell checking!
+import enchant
+dict_spelling = enchant.Dict("en_US")
+
+from spell_check_utils import (dict_uimsgs,
+                               split_words,
+                              )
+
+_spell_checked = set()
+def spell_check(txt, cache):
+    ret = []
+
+    if cache is not None and txt in cache:
+        return ret
+
+    for w in split_words(txt):
+        w_lower = w.lower()
+        if w_lower in dict_uimsgs | _spell_checked:
+            continue
+        if not dict_spelling.check(w):
+            ret.append("{}: suggestions are ({})"
+                       .format(w, "'" + "', '".join(dict_spelling.suggest(w))
+                                  + "'"))
+        else:
+            _spell_checked.add(w_lower)
+
+    if not ret:
+        if cache is not None:
+            cache.add(txt)
+
+    return ret
+
+
+def get_svnrev():
+    cmd = [SVN_EXECUTABLE,
+           "info",
+           "--xml",
+           SOURCE_DIR,
+           ]
+    xml = subprocess.check_output(cmd)
+    return re.search(b'revision="(\d+)"', xml).group(1)
+
+
+def gen_empty_pot():
+    blender_rev = get_svnrev()
+    utctime = time.gmtime()
+    time_str = time.strftime("%Y-%m-%d %H:%M+0000", utctime)
+    year_str = time.strftime("%Y", utctime)
+
+    return utils.gen_empty_messages(blender_rev, time_str, year_str)
+
+
+def merge_messages(msgs, states, messages, do_checks, spell_cache):
+    num_added = num_present = 0
+    for (context, msgid), srcs in messages.items():
+        if do_checks:
+            err = spell_check(msgid, spell_cache)
+            if err:
+                print("WARNING: spell check failed on “" + msgid + "”:")
+                print("\t\t" + "\n\t\t".join(err))
+                print("\tFrom:\n\t\t" + "\n\t\t".join(srcs))
+
+        # Escape some chars in msgid!
+        msgid = msgid.replace("\\", "\\\\")
+        msgid = msgid.replace("\"", "\\\"")
+        msgid = msgid.replace("\t", "\\t")
+
+        srcs = [COMMENT_PREFIX_SOURCE + s for s in srcs]
+
+        key = (context, msgid)
+        if key not in msgs:
+            msgs[key] = {"msgid_lines": [msgid],
+                         "msgstr_lines": [""],
+                         "comment_lines": srcs,
+                         "msgctxt_lines": [context]}
+            num_added += 1
+        else:
+            # We need to merge comments!
+            msgs[key]["comment_lines"].extend(srcs)
+            num_present += 1
+
+    return num_added, num_present
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Update blender.pot file " \
+                                                 "from messages.txt")
+    parser.add_argument('-w', '--warning', action="store_true",
+                        help="Show warnings.")
+    parser.add_argument('-i', '--input', metavar="File",
+                        help="Input messages file path.")
+    parser.add_argument('-o', '--output', metavar="File",
+                        help="Output pot file path.")
+
+    args = parser.parse_args()
+    if args.input:
+        global FILE_NAME_MESSAGES
+        FILE_NAME_MESSAGES = args.input
+    if args.output:
+        global FILE_NAME_POT
+        FILE_NAME_POT = args.output
+
+    print("Running fake py gettext…")
+    # Not using any more xgettext, simpler to do it ourself!
+    messages = {}
+    py_xgettext(messages)
+    print("Finished, found {} messages.".format(len(messages)))
+
+    if SPELL_CACHE and os.path.exists(SPELL_CACHE):
+        with open(SPELL_CACHE, 'rb') as f:
+            spell_cache = pickle.load(f)
+    else:
+        spell_cache = set()
+    print(len(spell_cache))
+
+    print("Generating POT file {}…".format(FILE_NAME_POT))
+    msgs, states = gen_empty_pot()
+    tot_messages, _a = merge_messages(msgs, states, messages,
+                                      True, spell_cache)
+
+    # add messages collected automatically from RNA
+    print("\tMerging RNA messages from {}…".format(FILE_NAME_MESSAGES))
+    messages = {}
+    with open(FILE_NAME_MESSAGES, encoding="utf-8") as f:
+        srcs = []
+        context = ""
+        for line in f:
+            line = utils.stripeol(line)
+
+            if line.startswith(COMMENT_PREFIX):
+                srcs.append(line[len(COMMENT_PREFIX):].strip())
+            elif line.startswith(CONTEXT_PREFIX):
+                context = line[len(CONTEXT_PREFIX):].strip()
+            else:
+                key = (context, line)
+                messages[key] = srcs
+                srcs = []
+                context = ""
+    num_added, num_present = merge_messages(msgs, states, messages,
+                                            True, spell_cache)
+    tot_messages += num_added
+    print("\tMerged {} messages ({} were already present)."
+          "".format(num_added, num_present))
+
+    # Write back all messages into blender.pot.
+    utils.write_messages(FILE_NAME_POT, msgs, states["comm_msg"],
+                         states["fuzzy_msg"])
+
+    print(len(spell_cache))
+    if SPELL_CACHE and spell_cache:
+        with open(SPELL_CACHE, 'wb') as f:
+            pickle.dump(spell_cache, f)
+
+    print("Finished, total: {} messages!".format(tot_messages - 1))
+
+    return 0
+
+
+if __name__ == "__main__":
+    print("\n\n *** Running {} *** \n".format(__file__))
+    sys.exit(main())
diff --git a/release/scripts/modules/i18n/update_trunk.py b/release/scripts/modules/i18n/update_trunk.py
new file mode 100755
index 00000000000..f4a2e0b3f8f
--- /dev/null
+++ b/release/scripts/modules/i18n/update_trunk.py
@@ -0,0 +1,132 @@
+#!/usr/bin/python3
+
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+# <pep8 compliant>
+
+# Update trunk from branches:
+# * Remove po’s in trunk.
+# * Copy po’s from branches advanced enough.
+# * Clean po’s in trunk.
+# * Compile po’s in trunk in mo’s, keeping track of those failing.
+# * Remove po’s, mo’s (and their dir’s) that failed to compile or
+#   are no more present in trunk.
+
+import subprocess
+import os
+import sys
+import shutil
+
+import settings
+
+TRUNK_PO_DIR = settings.TRUNK_PO_DIR
+TRUNK_MO_DIR = settings.TRUNK_MO_DIR
+
+PY3 = settings.PYTHON3_EXEC
+
+
+def main():
+    import argparse
+    parser = argparse.ArgumentParser(description="" \
+                        "Update trunk from branches:\n" \
+                        "* Remove po’s in trunk.\n" \
+                        "* Copy po’s from branches advanced enough.\n" \
+                        "* Clean po’s in trunk.\n" \
+                        "* Compile po’s in trunk in mo’s, keeping " \
+                        "track of those failing.\n" \
+                        "* Remove po’s and mo’s (and their dir’s) that " \
+                        "failed to compile or are no more present in trunk.")
+    parser.add_argument('-t', '--threshold', type=int,
+                        help="Import threshold, as a percentage.")
+    parser.add_argument('-p', '--po', action="store_false",
+                        help="Do not remove failing po’s.")
+    parser.add_argument('-m', '--mo', action="store_false",
+                        help="Do not remove failing mo’s.")
+    parser.add_argument('langs', metavar='ISO_code', nargs='*',
+                        help="Restrict processed languages to those.")
+    args = parser.parse_args()
+
+
+    ret = 0
+    failed = set()
+
+    # Remove po’s in trunk.
+    for po in os.listdir(TRUNK_PO_DIR):
+        if po.endswith(".po"):
+            lang = os.path.basename(po)[:-3]
+            if args.langs and lang not in args.langs:
+                continue
+            po = os.path.join(TRUNK_PO_DIR, po)
+            os.remove(po)
+
+    # Copy po’s from branches.
+    cmd = [PY3, "./import_po_from_branches.py", "-s"]
+    if args.threshold is not None:
+        cmd += ["-t", str(args.threshold)]
+    if args.langs:
+        cmd += args.langs
+    t = subprocess.call(cmd)
+    if t:
+        ret = t
+
+    # Add in failed all mo’s no more having relevant po’s in trunk.
+    for lang in os.listdir(TRUNK_MO_DIR):
+        if lang == ".svn":
+            continue  # !!!
+        if not os.path.exists(os.path.join(TRUNK_PO_DIR, ".".join((lang, "po")))):
+            failed.add(lang)
+
+    # Check and compile each po separatly, to keep track of those failing.
+    # XXX There should not be any failing at this stage, import step is
+    #     supposed to have already filtered them out!
+    for po in os.listdir(TRUNK_PO_DIR):
+        if po.endswith(".po") and not po.endswith("_raw.po"):
+            lang = os.path.basename(po)[:-3]
+            if args.langs and lang not in args.langs:
+                continue
+
+            cmd = [PY3, "./clean_po.py", "-t", "-s", lang]
+            t = subprocess.call(cmd)
+            if t:
+                ret = t
+                failed.add(lang)
+                continue
+
+            cmd = [PY3, "./update_mo.py", lang]
+            t = subprocess.call(cmd)
+            if t:
+                ret = t
+                failed.add(lang)
+
+    # Remove failing po’s, mo’s and related dir’s.
+    for lang in failed:
+        print("Lang “{}” failed, removing it...".format(lang))
+        if args.po:
+            po = os.path.join(TRUNK_PO_DIR, ".".join((lang, "po")))
+            if os.path.exists(po):
+                os.remove(po)
+        if args.mo:
+            mo = os.path.join(TRUNK_MO_DIR, lang)
+            if os.path.exists(mo):
+                shutil.rmtree(mo)
+
+
+if __name__ == "__main__":
+    print("\n\n *** Running {} *** \n".format(__file__))
+    sys.exit(main())
diff --git a/release/scripts/modules/i18n/user_settings.py b/release/scripts/modules/i18n/user_settings.py
new file mode 100644
index 00000000000..23d9783cd0f
--- /dev/null
+++ b/release/scripts/modules/i18n/user_settings.py
@@ -0,0 +1,23 @@
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+# <pep8 compliant>
+
+import os
+
+import settings
diff --git a/release/scripts/modules/i18n/utils.py b/release/scripts/modules/i18n/utils.py
new file mode 100644
index 00000000000..dfed2088878
--- /dev/null
+++ b/release/scripts/modules/i18n/utils.py
@@ -0,0 +1,377 @@
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+# <pep8 compliant>
+
+# Some misc utilities...
+
+import os
+import sys
+import collections
+from codecs import open
+
+import settings
+
+
+COMMENT_PREFIX = settings.COMMENT_PREFIX
+WARN_NC = settings.WARN_MSGID_NOT_CAPITALIZED
+NC_ALLOWED = settings.WARN_MSGID_NOT_CAPITALIZED_ALLOWED
+
+
+def stripeol(s):
+    return s.rstrip("\n\r")
+
+
+# XXX For now, we assume that all messages > 30 chars are tooltips!
+def is_tooltip(msgid):
+    return len(msgid) > 30
+
+def parse_messages(fname):
+    """
+    Returns a tupple (messages, states, stats).
+    messages is an odereddict of dicts
+        {(ctxt, msgid): {msgid_lines:, msgstr_lines:,
+                         comment_lines:, msgctxt_lines:}}.
+    states is a dict of three sets of (msgid, ctxt), and a boolean flag
+        indicating the .po is somewhat broken
+        {trans_msg:, fuzzy_msg:, comm_msg:, is_broken:}.
+    stats is a dict of values
+        {tot_msg:, trans_msg:, tot_ttips:, trans_ttips:, comm_msg:,
+         nbr_signs:, nbr_trans_signs:, contexts: set()}.
+    Note: This function will silently "arrange" mis-formated entries, thus
+        using afterward write_messages() should always produce a po-valid file,
+        though not correct!
+    """
+    tot_messages = 0
+    tot_tooltips = 0
+    trans_messages = 0
+    trans_tooltips = 0
+    comm_messages = 0
+    nbr_signs = 0
+    nbr_trans_signs = 0
+    contexts = set()
+    reading_msgid = False
+    reading_msgstr = False
+    reading_msgctxt = False
+    reading_comment = False
+    is_translated = False
+    is_fuzzy = False
+    is_commented = False
+    is_broken = False
+    msgid_lines = []
+    msgstr_lines = []
+    msgctxt_lines = []
+    comment_lines = []
+
+    messages = getattr(collections, 'OrderedDict', dict)()
+    translated_messages = set()
+    fuzzy_messages = set()
+    commented_messages = set()
+
+
+    def clean_vars():
+        nonlocal reading_msgid, reading_msgstr, reading_msgctxt, \
+                 reading_comment, is_fuzzy, is_translated, is_commented, \
+                 msgid_lines, msgstr_lines, msgctxt_lines, comment_lines
+        reading_msgid = reading_msgstr = reading_msgctxt = \
+                        reading_comment = False
+        is_tooltip = is_fuzzy = is_translated = is_commented = False
+        msgid_lines = []
+        msgstr_lines = []
+        msgctxt_lines = []
+        comment_lines = []
+
+
+    def finalize_message():
+        nonlocal reading_msgid, reading_msgstr, reading_msgctxt, \
+                 reading_comment, is_fuzzy, is_translated, is_commented, \
+                 msgid_lines, msgstr_lines, msgctxt_lines, comment_lines, \
+                 messages, translated_messages, fuzzy_messages, \
+                 commented_messages, \
+                 tot_messages, tot_tooltips, trans_messages, trans_tooltips, \
+                 comm_messages, nbr_signs, nbr_trans_signs, contexts
+
+        msgid = "".join(msgid_lines)
+        msgctxt = "".join(msgctxt_lines)
+        msgkey = (msgctxt, msgid)
+        is_ttip = is_tooltip(msgid)
+
+        # Never allow overriding existing msgid/msgctxt pairs!
+        if msgkey in messages:
+            clean_vars()
+            return
+
+        nbr_signs += len(msgid)
+        if is_commented:
+            commented_messages.add(msgkey)
+        elif is_fuzzy:
+            fuzzy_messages.add(msgkey)
+        elif is_translated:
+            translated_messages.add(msgkey)
+            nbr_trans_signs += len("".join(msgstr_lines))
+        messages[msgkey] = {"msgid_lines"  : msgid_lines,
+                            "msgstr_lines" : msgstr_lines,
+                            "comment_lines": comment_lines,
+                            "msgctxt_lines": msgctxt_lines}
+
+        if is_commented:
+            comm_messages += 1
+        else:
+            tot_messages += 1
+            if is_ttip:
+                tot_tooltips += 1
+            if not is_fuzzy and is_translated:
+                trans_messages += 1
+                if is_ttip:
+                    trans_tooltips += 1
+            if msgctxt not in contexts:
+                contexts.add(msgctxt)
+
+        clean_vars()
+
+
+    with open(fname, 'r', "utf-8") as f:
+        for line_nr, line in enumerate(f):
+            line = stripeol(line)
+            if line == "":
+                finalize_message()
+
+            elif line.startswith("msgctxt") or \
+                 line.startswith("".join((COMMENT_PREFIX, "msgctxt"))):
+                reading_comment = False
+                reading_ctxt = True
+                if line.startswith(COMMENT_PREFIX):
+                    is_commented = True
+                    line = line[9+len(COMMENT_PREFIX):-1]
+                else:
+                    line = line[9:-1]
+                msgctxt_lines.append(line)
+
+            elif line.startswith("msgid") or \
+                 line.startswith("".join((COMMENT_PREFIX, "msgid"))):
+                reading_comment = False
+                reading_msgid = True
+                if line.startswith(COMMENT_PREFIX):
+                    is_commented = True
+                    line = line[7+len(COMMENT_PREFIX):-1]
+                else:
+                    line = line[7:-1]
+                msgid_lines.append(line)
+
+            elif line.startswith("msgstr") or \
+                 line.startswith("".join((COMMENT_PREFIX, "msgstr"))):
+                if not reading_msgid:
+                    is_broken = True
+                else:
+                    reading_msgid = False
+                reading_msgstr = True
+                if line.startswith(COMMENT_PREFIX):
+                    line = line[8+len(COMMENT_PREFIX):-1]
+                    if not is_commented:
+                        is_broken = True
+                else:
+                    line = line[8:-1]
+                    if is_commented:
+                        is_broken = True
+                msgstr_lines.append(line)
+                if line:
+                    is_translated = True
+
+            elif line.startswith("#"):
+                if reading_msgid:
+                    if is_commented:
+                        msgid_lines.append(line[1+len(COMMENT_PREFIX):-1])
+                    else:
+                        msgid_lines.append(line)
+                        is_broken = True
+                elif reading_msgstr:
+                    if is_commented:
+                        msgstr_lines.append(line[1+len(COMMENT_PREFIX):-1])
+                    else:
+                        msgstr_lines.append(line)
+                        is_broken = True
+                else:
+                    if line.startswith("#, fuzzy"):
+                        is_fuzzy = True
+                    else:
+                        comment_lines.append(line)
+                    reading_comment = True
+
+            else:
+                if reading_msgid:
+                    msgid_lines.append(line[1:-1])
+                elif reading_msgstr:
+                    line = line[1:-1]
+                    msgstr_lines.append(line)
+                    if not is_translated and line:
+                        is_translated = True
+                else:
+                    is_broken = True
+
+        # If no final empty line, last message is not finalized!
+        if reading_msgstr:
+            finalize_message()
+
+
+    return (messages,
+            {"trans_msg": translated_messages,
+             "fuzzy_msg": fuzzy_messages,
+             "comm_msg" : commented_messages,
+             "is_broken": is_broken},
+            {"tot_msg"        : tot_messages,
+             "trans_msg"      : trans_messages,
+             "tot_ttips"      : tot_tooltips,
+             "trans_ttips"    : trans_tooltips,
+             "comm_msg"       : comm_messages,
+             "nbr_signs"      : nbr_signs,
+             "nbr_trans_signs": nbr_trans_signs,
+             "contexts"       : contexts})
+
+
+def write_messages(fname, messages, commented, fuzzy):
+    "Write in fname file the content of messages (similar to parse_messages " \
+    "returned values). commented and fuzzy are two sets containing msgid. " \
+    "Returns the number of written messages."
+    num = 0
+    with open(fname, 'w', "utf-8") as f:
+        for msgkey, val in messages.items():
+            msgctxt, msgid = msgkey
+            f.write("\n".join(val["comment_lines"]))
+            # Only mark as fuzzy if msgstr is not empty!
+            if msgkey in fuzzy and "".join(val["msgstr_lines"]):
+                f.write("\n#, fuzzy")
+            if msgkey in commented:
+                if msgctxt:
+                    f.write("\n{}msgctxt \"".format(COMMENT_PREFIX))
+                    f.write("\"\n{}\"".format(COMMENT_PREFIX).join(
+                                       val["msgctxt_lines"]))
+                    f.write("\"")
+                f.write("\n{}msgid \"".format(COMMENT_PREFIX))
+                f.write("\"\n{}\"".format(COMMENT_PREFIX).join(
+                                   val["msgid_lines"]))
+                f.write("\"\n{}msgstr \"".format(COMMENT_PREFIX))
+                f.write("\"\n{}\"".format(COMMENT_PREFIX).join(
+                                   val["msgstr_lines"]))
+                f.write("\"\n\n")
+            else:
+                if msgctxt:
+                    f.write("\nmsgctxt \"")
+                    f.write("\"\n\"".join(val["msgctxt_lines"]))
+                    f.write("\"")
+                f.write("\nmsgid \"")
+                f.write("\"\n\"".join(val["msgid_lines"]))
+                f.write("\"\nmsgstr \"")
+                f.write("\"\n\"".join(val["msgstr_lines"]))
+                f.write("\"\n\n")
+            num += 1
+    return num
+
+
+def gen_empty_messages(blender_rev, time_str, year_str):
+    """Generate an empty messages & state data (only header if present!)."""
+    header_key = ("", "")
+
+    messages = getattr(collections, 'OrderedDict', dict)()
+    messages[header_key] = {
+        "msgid_lines": [""],
+        "msgctxt_lines": [],
+        "msgstr_lines": [
+            "Project-Id-Version: Blender r{}\\n"
+            "".format(blender_rev),
+            "Report-Msgid-Bugs-To: \\n",
+            "POT-Creation-Date: {}\\n"
+            "".format(time_str),
+            "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\\n",
+            "Last-Translator: FULL NAME <EMAIL@ADDRESS>\\n",
+            "Language-Team: LANGUAGE <LL@li.org>\\n",
+            "Language: \\n",
+            "MIME-Version: 1.0\\n",
+            "Content-Type: text/plain; charset=UTF-8\\n",
+            "Content-Transfer-Encoding: 8bit\\n"
+        ],
+        "comment_lines": [
+            "# Blender's translation file (po format).",
+            "# Copyright (C) {} The Blender Foundation."
+            "".format(year_str),
+            "# This file is distributed under the same "
+            "# license as the Blender package.",
+            "# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.",
+            "#",
+        ],
+    }
+
+    states = {"trans_msg": set(),
+              "fuzzy_msg": {header_key},
+              "comm_msg": set(),
+              "is_broken": False}
+
+    return messages, states
+
+
+def print_stats(stats, glob_stats=None, prefix=""):
+    """
+    Print out some stats about a po file.
+    glob_stats is for making global stats over several po's.
+    """
+    tot_msgs        = stats["tot_msg"]
+    trans_msgs      = stats["trans_msg"]
+    tot_ttips       = stats["tot_ttips"]
+    trans_ttips     = stats["trans_ttips"]
+    comm_msgs       = stats["comm_msg"]
+    nbr_signs       = stats["nbr_signs"]
+    nbr_trans_signs = stats["nbr_trans_signs"]
+    contexts        = stats["contexts"]
+    lvl = lvl_ttips = lvl_trans_ttips = lvl_ttips_in_trans = lvl_comm = 0.0
+
+    if tot_msgs > 0:
+        lvl = float(trans_msgs)/float(tot_msgs)
+        lvl_ttips = float(tot_ttips)/float(tot_msgs)
+        lvl_comm = float(comm_msgs)/float(tot_msgs+comm_msgs)
+    if tot_ttips > 0:
+        lvl_trans_ttips = float(trans_ttips)/float(tot_ttips)
+    if trans_msgs > 0:
+        lvl_ttips_in_trans = float(trans_ttips)/float(trans_msgs)
+
+    if glob_stats:
+        glob_stats["nbr"]                += 1.0
+        glob_stats["lvl"]                += lvl
+        glob_stats["lvl_ttips"]          += lvl_ttips
+        glob_stats["lvl_trans_ttips"]    += lvl_trans_ttips
+        glob_stats["lvl_ttips_in_trans"] += lvl_ttips_in_trans
+        glob_stats["lvl_comm"]           += lvl_comm
+        glob_stats["nbr_trans_signs"]    += nbr_trans_signs
+        if glob_stats["nbr_signs"] == 0:
+            glob_stats["nbr_signs"] = nbr_signs
+        glob_stats["contexts"] |= contexts
+
+    lines = ("",
+             "{:>6.1%} done! ({} translated messages over {}).\n"
+             "".format(lvl, trans_msgs, tot_msgs),
+             "{:>6.1%} of messages are tooltips ({} over {}).\n"
+             "".format(lvl_ttips, tot_ttips, tot_msgs),
+             "{:>6.1%} of tooltips are translated ({} over {}).\n"
+             "".format(lvl_trans_ttips, trans_ttips, tot_ttips),
+             "{:>6.1%} of translated messages are tooltips ({} over {}).\n"
+             "".format(lvl_ttips_in_trans, trans_ttips, trans_msgs),
+             "{:>6.1%} of messages are commented ({} over {}).\n"
+             "".format(lvl_comm, comm_msgs, comm_msgs+tot_msgs),
+             "This translation is currently made of {} signs.\n"
+             "".format(nbr_trans_signs))
+    print(prefix.join(lines))
+    return 0
+