​x
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<style type="text/css">
*[lang|="en"] {color: blue;}
{
color: red;
}
</style>
</head>
​
<body>
<h1>可以应用样式：</h1>
<p lang="en">Hello!</p>
<p lang="en-us">Greetings!</p>
<p lang="en-au">G'day!</p>
​
​
<hr />
​
<h1>无法应用样式：</h1>
<p lang="fr">Bonjour!</p>
<p lang="cy-en">Jrooana!</p>
</body>
</html>
​