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