code: public static function getTranslation($key)
    {
      $key = strtoupper($key);
      if ( isset(self::$translations[$key]) ){
        return self::$translations[$key];
      }
      
      return self::$translations['UNKNOWN_ERROR'];
    }
docs: Translation
  
  @param   string  $key  The translation key
  @return  string  Translated string or "Unknown Error" if not found