The UI language rather than the locale is now used to pick Chrome's language ...

chrome/installer/util/prebuild/create_string_rc.py

 #!/usr/bin/python
 # Copyright (c) 2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """This script generates an rc file and header (setup_strings.{rc,h}) to be
 included in setup.exe. The rc file includes translations for strings pulled
 from generated_resource.grd and the localized .xtb files.
 
 The header file includes IDs for each string, but also has values to allow
@@ skipping 157 matching lines @@
                                    translation))
   lines.append(kFooterText)
   outfile = open(out_filename + '.rc', 'wb')
   outfile.write(''.join(lines).encode('utf-16'))
   outfile.close()
 
 def WriteHeaderFile(translated_strings, out_filename):
   """Writes a .h file with resource ids.  This file can be included by the
   executable to refer to identifiers."""
   lines = []
+  do_languages_lines = [u'#define DO_LANGUAGES']
 
   # Write the values for how the languages ids are offset.
   seen_languages = set()
   offset_id = 0
   for translation_struct in translated_strings:
     lang = translation_struct.language
     if lang not in seen_languages:
       seen_languages.add(lang)
       lines.append(u'#define IDS_L10N_OFFSET_%s %s' % (lang, offset_id))
+      do_languages_lines.append(u'  HANDLE_LANGUAGE(%s, IDS_L10N_OFFSET_%s)'
+                                % (lang.replace('_', '-').lower(), lang))

[robertshield, 2010/11/11 14:42:18]

why are these strings unicode strings, but not the ones below?

[grt (UTC plus 2), 2010/11/11 15:23:57]

Your guess is as good as mine.  erikwright@chromium.org, who is wise in the ways
of Python, tells me it's okay as is, but odd; possibly the result of multiple
people editing and not keeping track of things, or possibly to handle corner
cases involving Unicode and non-Unicode strings.  All language tags are ASCII,
so all should be well.  Would you like me to make all of the strings Unicode in
this file?

[robertshield, 2010/11/11 16:18:53]

They should be consistent. Inconsistencies like this make people wonder whether
there's a motive behind them. 

If none of the strings need to be unicode, lets make them all ascii. If some
need to be unicode, lets make them all that way.

[grt (UTC plus 2), 2010/11/11 16:29:27]

Done.

       offset_id += 1
     else:
       break
 
   # Write the resource ids themselves.
   resource_id = kFirstResourceID
   for translation_struct in translated_strings:
     lines.append(u'#define %s %s' % (translation_struct.resource_id_str,
                                      resource_id))
     resource_id += 1
 
   # Write out base ID values.
   for string_id in kStringIds:
     lines.append(u'#define %s_BASE %s_%s' % (string_id,
                                              string_id,
                                              translated_strings[0].language))
 
   outfile = open(out_filename + '.h', 'wb')
   outfile.write('\n'.join(lines))
-  outfile.write('\n')  # .rc files must end in a new line
+  outfile.write('\n#ifndef RC_INVOKED\n')
+  outfile.write(' \\\n'.join(do_languages_lines))
+  # .rc files must end in a new line
+  outfile.write('\n#endif  // ndef RC_INVOKED\n')
   outfile.close()
 
 def main(argv):
   branding = ''
   if (len(sys.argv) > 2):
     branding = argv[2]
   translated_strings = CollectTranslatedStrings(branding)
   kFilebase = os.path.join(argv[1], 'installer_util_strings')
   WriteRCFile(translated_strings, kFilebase)
   WriteHeaderFile(translated_strings, kFilebase)
 
 if '__main__' == __name__:
   if len(sys.argv) < 2:
     print 'Usage:\n  %s <output_directory> [branding]' % sys.argv[0]
     sys.exit(1)
   # Use optparse to parse command line flags.
   main(sys.argv)