HTTP header and html lang
Assertion holds if you see green below.
This test is only valid if the user agent recognises the HTTP and html lang declarations, and :lang works.
| Ignore this test. (:lang not supported) |
Assertion: If there is a conflict between the language declarations in the HTTP header and the html element using lang, the UA will recognize the language declared in the html element.
Notes:
Red means the HTTP had precedence.