자동등록방지글 번역적용 php 질문드립니다.

// 캡챠 HTML 코드 출력function captcha_html($class="captcha"){    if(is_mobile())        $class .= ' m_captcha';     $html .= "\n".'<script>var g5_captcha_url  = "'.G5_CAPTCHA_URL.'";</script>';    //$html .= "\n".'<script>var g5_captcha_path = "'.G5_CAPTCHA_PATH.'";</script>';    $html .= "\n".'<script src="'.G5_CAPTCHA_URL.'/kcaptcha.js"></script>';    $html .= "\n".'<fieldset id="captcha" class="'.$class.'">';    $html .= "\n".'<legend><label for="captcha_key">자동등록방지</label></legend>';    if (is_mobile()) $html .= '<audio src="#" id="captcha_audio" controls></audio>';    //$html .= "\n".'<img src="#" alt="" id="captcha_img">';    $html .= "\n".'<img src="javascript:void(0);" alt="" id="captcha_img">';    if (!is_mobile()) $html .= "\n".'<button type="button" id="captcha_mp3"><span></span>숫자음성듣기</button>';    $html .= "\n".'<button type="button" id="captcha_reload"><span></span>새로고침</button>';    $html .= '<input type="text" name="captcha_key" id="captcha_key"  class="captcha_box required" size="6" maxlength="6">';     $html .= "\n".'<span id="captcha_info">자동등록방지 숫자를 순서대로 입력하세요.</span>'; // 번역 추가 한국if($lang =="kr") {     $html .= "\n".'<span id="captcha_info">한글.</span>';}// 번역 추가 영문 if($lang =="en"){    $html .= "\n".'<span id="captcha_info">eng.</span>';}     $html .= "\n".'</fieldset>';     return $html;}