hello english<script>
function switchLanguageFromEnglish(langCode) {
  const currentPath = window.location.pathname;
  const pathWithoutLang = currentPath.replace(/^\/en/, '');

  // مقصد نهایی
  const newPath = (langCode === 'fa') ? pathWithoutLang : '/' + langCode + pathWithoutLang;
  const targetURL = window.location.origin + newPath;

  fetch(targetURL, { method: 'HEAD' }).then(response => {
    if (response.status === 200) {
      window.location.href = targetURL;
    } else {
      window.location.href = (langCode === 'fa') ? '/' : '/' + langCode + '/';
    }
  }).catch(() => {
    window.location.href = (langCode === 'fa') ? '/' : '/' + langCode + '/';
  });
}
</script>
<a href="#" onclick="switchLanguageFromEnglish('fa')">فارسی</a> |
<a href="#" onclick="switchLanguageFromEnglish('ar')">العربية</a>