Metaregistrar\EPP\eppLoginRequest::addLanguage PHP Method

    public function addLanguage($language)
    {
        $this->checkForOptions();
        if (!strlen($language)) {
            throw new eppException('No language specified for login attempt');
        }
        if ($this->options) {
            $this->options->appendChild($this->createElement('lang', $language));
        }
    }