<html>
<head>
<style type="text/css">
p:lang(fr) { color: red }
p:lang(en) { color: green }
p:lang(en-us) { color: yellow }
</style>
</head>
<body>
    <h1>Html Heading</h1>
    <p lang='fr'>fzz</p>
    <h2>Html Heading</h2>
    <p lang='en-us'>fzz</p>
    <p lang='en'>fzz todo doesnt work</p>
</body>
</html>