src/Helper.php
public static function getTranslation($key)
  {
    $key = strtoupper($key);
    if ( isset(self::$translations[$key]) ){
      return self::$translations[$key];
    }
    
    return self::$translations['UNKNOWN_ERROR'];
  }
public static function getTranslation($key)
  {
    $key = strtoupper($key);
    if ( isset(self::$translations[$key]) ){
      return self::$translations[$key];
    }
    
    return self::$translations['UNKNOWN_ERROR'];
  }
Translation

@param   string  $key  The translation key
@return  string  Translated string or "Unknown Error" if not found