--- a/browser/components/translation/Translation.jsm
+++ b/browser/components/translation/Translation.jsm
@@ -27,18 +27,18 @@ this.Translation = {
   STATE_OFFER: 0,
   STATE_TRANSLATING: 1,
   STATE_TRANSLATED: 2,
   STATE_ERROR: 3,
   STATE_UNAVAILABLE: 4,
 
   serviceUnavailable: false,
 
-  supportedSourceLanguages: ["de", "en", "es", "fr", "ja", "ko", "pt", "ru", "zh"],
-  supportedTargetLanguages: ["de", "en", "es", "fr", "ja", "ko", "pl", "pt", "ru", "tr", "vi", "zh"],
+  supportedSourceLanguages: ["bg", "cs", "de", "en", "es", "fr", "ja", "ko", "nl", "no", "pl", "pt", "ru", "tr", "vi", "zh"],
+  supportedTargetLanguages: ["bg", "cs", "de", "en", "es", "fr", "ja", "ko", "nl", "no", "pl", "pt", "ru", "tr", "vi", "zh"],
 
   _defaultTargetLanguage: "",
   get defaultTargetLanguage() {
     if (!this._defaultTargetLanguage) {
       this._defaultTargetLanguage = Cc["@mozilla.org/chrome/chrome-registry;1"]
                                       .getService(Ci.nsIXULChromeRegistry)
                                       .getSelectedLocale("global")
                                       .split("-")[0];