public function getOrderLanguage()
    {
        if ($this->_iOrderLang === null) {
            if (isset($this->oxorder__oxlang->value)) {
                $this->_iOrderLang = \OxidEsales\Eshop\Core\Registry::getLang()->validateLanguage($this->oxorder__oxlang->value);
            } else {
                $this->_iOrderLang = \OxidEsales\Eshop\Core\Registry::getLang()->getBaseLanguage();
            }
        }

        return $this->_iOrderLang;
    }