code: public function trans($strId, array $arrParams=array(), $strDomain='contao_default')
  	{
  		return System::getContainer()->get('translator')->trans($strId, $arrParams, $strDomain);
  	}
docs: Returns a translated message
  
  @param string $strId
  @param array  $arrParams
  @param string $strDomain
  
  @return string