Add extra I18n settings

app/templates/_jshintrc

@@ -21,6 +21,7 @@
         "Ember": true,
         "Em": true,
         "Handlebars": true,
-        "DS": true
+        "DS": true,
+        "I18n": true
     }
 }

app/templates/scripts/l10n/translations.js

@@ -1,3 +1,9 @@
+// If fallbacks is set to `true`, this is the language that will be used if
+// the current language has no available translation.
+I18n.defaultLocale = "en-US";
+I18n.locale = window.navigator.language || 'en-US';
+// Set to false to show missing translations.
+I18n.fallbacks = true;
 I18n.translations = {
     en: {
         app: {