Backend\Modules\Authentication\Actions\Index::parse PHP Method

    public function parse()
    {
        parent::parse();
        // assign the interface language ourself, because it won't be assigned automagically
        $this->tpl->assign('INTERFACE_LANGUAGE', BL::getInterfaceLanguage());
        $this->frm->parse($this->tpl);
        $this->frmForgotPassword->parse($this->tpl);
    }