lp.answers.browser.questiontarget.UserSupportLanguagesMixin : API documentation

@cachedproperty
def user_support_languages(self):

The set of user support languages.

This set includes the user's preferred languages, or request languages, or GeoIP languages, according to the implementation of preferred_or_request_languages(), which specifies:

When the user does not have preferred languages, the languages will be inferred from the request Accept-Language header.
As a last resort, the code falls back on GeoIP rules to determine the user's languages.

English is added to the list instead when an English variant is returned.

l.a.b.q.UserSupportLanguagesMixin : class documentation