protected function getErrorMessageFile()
{
$lang = Prado::getPreferredLanguage();
$msgFile = Prado::getFrameworkPath() . '/Exceptions/messages/messages-' . $lang . '.txt';
if (!is_file($msgFile)) {
$msgFile = Prado::getFrameworkPath() . '/Exceptions/messages/messages.txt';
}
return $msgFile;
}