public static void removeKey(LanguageKey key) {
    String _key = key.getKey();

    for (Language language : languageList) language.removeValue(_key);

    keyList.remove(key);
    keyById.remove(key.getKeyId());
    keyByKey.remove(_key);
  }
 public static void addKey(LanguageKey key) {
   keyList.add(key);
   keyById.put(key.getKeyId(), key);
   keyByKey.put(key.getKey(), key);
 }