More and more websites consider it clever to display in the language that I set up in Firefox to be my primary language (or the first one in the list of preferred languages). Unfortunately if that happens to be not the native language of said site, it is more often than not a machine-translated version which is more difficult to understand than the native language if I happen to speak it. So is there any way to make Firefox transmit something like "display the site in the native language if it's among the languages I claim to understand, and only if that is not the case bother me with your bad translation"?
edit I'd be fine with using a plugin. I guess the first question is however, does HTTP offer any feature to let website inform the browser about their native language such that the browser can decide which
HTTP_ACCEPTED_LANGUAGE to choose?