What are Content-Language and Accept-Language?

Question

I have seen the HTTP headers of Content-Language and Accept-Language, could someone explain what these are for and the difference between them? I h

Answer 1

The Content-Language entity header is used to describe the language(s) intended for the audience, so that it allows a user to differentiate according to the users' own preferred language.

Header type                     Entity header
Forbidden header name           no
CORS-safelisted response-header yes
CORS-safelisted request-header  yes

— MDN Web Reference - HTTP Headers - Content-Language

The Accept-Language request HTTP header advertises which languages the client is able to understand, and which locale variant is preferred. (By languages, we mean natural languages, such as English, and not programming languages.)

Header type                     Request header
Forbidden header name           no
CORS-safelisted request-header  yes

— MDN Web Reference - HTTP Headers - Accept-Language