chromium/src/third_party/blink/web_tests/fast/selectors/lang-inheritance.html - manifest_repos/chromium_src - Git at Google

 <!DOCTYPE html>
 <html>
  <title>':lang()': inherit LANG from parent element</title>
  <style>
   p:lang(x) { background: green }
  </style>
  <div lang="x-test">
     <p>This line should have a green background.
     <p lang="y-test">This line should NOT have a green background.
  </div>
 </html>
	<!DOCTYPE html>
	<html>
	<title>':lang()': inherit LANG from parent element</title>
	<style>
	p:lang(x) { background: green }
	</style>
	<div lang="x-test">
	<p>This line should have a green background.
	<p lang="y-test">This line should NOT have a green background.
	</div>
	</html>