GRN2-xx: Added fallback language to locales (#788)

* Added fallback language to locales

* Added comments

app/assets/javascripts/main.js

@@ -20,4 +20,26 @@ $(document).on('turbolinks:load', function(){
 
 document.addEventListener("turbolinks:before-cache", function() {
   $(".alert").remove()
-})
+})
+
+// Gets the localized string
+function getLocalizedString(key) {
+  var keyArr = key.split(".")
+  var translated = I18n
+
+  // Search current language for the key
+  keyArr.forEach(function(k) {
+    translated = translated[k]
+  })
+
+  // If key is not found, search the fallback language for the key
+  if (translated == undefined) { 
+    translated = I18nFallback
+
+    keyArr.forEach(function(k) {
+      translated = translated[k]
+    })
+  }
+
+  return translated
+}