Add both English and the alternate language to the preferred language list on first login.

chrome/browser/chromeos/preferences.cc

 // 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.
 
 #include "chrome/browser/chromeos/preferences.h"
 
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
@@ skipping 146 matching lines @@
         locale, input_method::kAllInputMethods, &input_method_ids);
     if (!input_method_ids.empty()) {
       if (!preload_engines.empty())
         preload_engines += ',';
       preload_engines += JoinString(input_method_ids, ',');
     }
     language_preload_engines_.SetValue(preload_engines);
   }
   // Add the UI language to the preferred languages the user first logs in.
   if (!prefs->HasPrefPath(prefs::kLanguagePreferredLanguages)) {
-    language_preferred_languages_.SetValue(locale);
+    std::string preferred_languages(locale);
+    if (locale != kFallbackInputMethodLocale) {
+      preferred_languages += ",";
+      preferred_languages += kFallbackInputMethodLocale;
+    }
+    language_preferred_languages_.SetValue(preferred_languages);
   }
 
   // Initialize touchpad settings to what's saved in user preferences.
   NotifyPrefChanged(NULL);
 }
 
 void Preferences::Observe(NotificationType type,
                           const NotificationSource& source,
                           const NotificationDetails& details) {
   if (type == NotificationType::PREF_CHANGED)
@@ skipping 203 matching lines @@
   std::vector<std::string> split_values;
   if (!value.empty())
     SplitString(value, ',', &split_values);
 
   // We should call the cros API even when |value| is empty, to disable default
   // config.
   SetLanguageConfigStringList(section, name, split_values);
 }
 
 }  // namespace chromeos