message: zh detection fix
diff: @@ -22,6 +22,9 @@ function getBrowserName(agent) {
  function getUserLocale() {
  var lang = (window.navigator.userLanguage || window.navigator.language).toLowerCase() || 'en';
  console.info('Language Detected: ' + lang);
  + if (lang.startsWith('zh-') && lang.length === 5) {
  + lang = lang === 'zh-cn' ? 'zh-chs' : 'zh-cht';
  + }
  if (!supportedLanguages.includes(lang)) {
  lang = lang.split('-', 1)[0];
  }
  