What did you do? ================ 1. Adjust your browser or OS settings, so that it says that you prefer a given language, e.g. French. 2. In the profile of your MDN account, choose another language, e.g. English. 3. Visit https://developer.mozilla.org/ What happened? ============== You get a localised version according to the information sent by your browser (in my case, French). What should have happened? ========================== I wish to override my language preference specifically for developer.mozilla.org (in my case, I want English). Is there anything else we should know? ======================================

The language setting of the MDN account seems to be the natural place to specify that preference. As far as can tell, that setting doesn't currently have much observable effect (if any).

I do agree with Claude. The perfect behavior would be: 1. If the locale is indicated by the URL /fr/ /bn-BD/, use it 2. If not and the user is logged in, use the locale he used on his profile (it must be an explicit set, not the default value) 3. Else you the Accept-Language value. Note that it may not be easy to do as the default language selection may happen in a low layer, or in a front component, where profile information may not be available. Asking feedback from Les about the technical complexity to do this (i.e. to add point 2). If it is too complex it may not be worth doing it.

Added details in bug 926963: https://bugzilla.mozilla.org/show_bug.cgi?id=926963#c5