<!DOCTYPE html>
<html class="reftest-wait">
<script>
function init() {
    var editor = document.getElementById('editor');
    // invalid language will default to en-US
    editor.setAttribute('lang', 'testing-XX');
    editor.addEventListener("focus", function() {
        window.setTimeout(function() {
            document.documentElement.className = '';
        }, 0);
    }, false);
    editor.focus();
}
</script>
<body onload="init()">
    <textarea id="editor" lang="en-US">good possible word</textarea>
</body>
</html>