Changing reCAPTCHA v2 lang dynamically

change_captcha_v2_lang.js

function setCaptchaLang(lang) {

      const container = document.getElementById('captcha_container');

      // Get GoogleCaptcha iframe
      const iframeGoogleCaptcha = container.querySelector('iframe');

      // Get language code from iframe
      const actualLang = iframeGoogleCaptcha.getAttribute("src").match(/hl=(.*?)&/).pop();

      // For setting new language
      if (actualLang !== lang) {
        iframeGoogleCaptcha.setAttribute("src", iframeGoogleCaptcha.getAttribute("src").replace(/hl=(.*?)&/, 'hl=' + lang + '&'));
      }
    }