Web-LangTag/search.xml

<?xml version="1.0" encoding="utf-8"?>
<page title="Search the Language Subtag Registry">
  <p>Type a code or a description (for instance, "<code>fr</code>", or "german"):</p>
  <form action="https://www.langtag.net/search" method="post">
    <p>Name: <input type="text" name="string"/></p>
    <p>Search in: <select name="what">
     <option value="language">Languages</option>
     <option value="script">Scripts</option>
     <option value="region">Regions</option>
    </select></p>
    <p><input type="submit" value="Search"/></p>
  </form>
</page>