source/Core/Language.php
public function getUrlLang($iLang = null)
    {
        if (!$this->isAdmin()) {
            $iLang = isset($iLang) ? $iLang : $this->getBaseLanguage();
            return $this->getName() . "=" . $iLang;
        }
    }
public function getUrlLang($iLang = null)
    {
        if (!$this->isAdmin()) {
            $iLang = isset($iLang) ? $iLang : $this->getBaseLanguage();
            return $this->getName() . "=" . $iLang;
        }
    }
public function getUrlLang ( $ iLang = null ) { if ( ! $ this -> isAdmin ( ) ) { $ iLang = isset ( $ iLang ) ? $ iLang : $ this -> getBaseLanguage ( ) ; return $ this -> getName ( ) . "=" . $ iLang ; } }
Returns url language parameter

@param int $iLang language id [optional]

@return string
Returns url language parameter