enable linting for newly translated languages

scripts/translations/find-duplicate-translations.js

@@ -62,6 +62,9 @@ var FULL_LANGUAGES = {
     FR: Util.clone(require("../../www/common/translations/messages.fr.json")),
     DE: Util.clone(require("../../www/common/translations/messages.de.json")),
     JP: Util.clone(require("../../www/common/translations/messages.ja.json")),
+    RU: Util.clone(require("../../www/common/translations/messages.ru.json")),
+    CS: Util.clone(require("../../www/common/translations/messages.cs.json")),
+    PT_BR: Util.clone(require("../../www/common/translations/messages.pt-br.json")),
 };
 
 var DUPLICATES = {};
@@ -78,7 +81,7 @@ var extraneousKeys = 0;
 // such keys should not be simplified/deduplicated
 Object.keys(DUPLICATES.EN).forEach(function (key) {
     var reference = DUPLICATES.EN[key];
-    if (!['FR', 'DE', 'JP'].every(function (code) {
+    if (!['FR', 'DE', 'JP', 'RU', 'CS', 'PT_BR'].every(function (code) {
         try {
             Assert.deepEqual(reference, DUPLICATES[code][key]);
         } catch (err) {

scripts/translations/lint-translations.js

@@ -102,6 +102,7 @@ processLang(EN, 'en', true);
   'cs',
   'de',
   'es',
+  'eu',
   'fi',
   'fr',
   'hi',