You set all the language you want with priorities and the webserver knows it's own language and serves you the intersection with the highest priority. Or do I misunderstand your question?
I mean the locale, not the language. Many web sites are in a single language and target a specific culture. I want that to be respected by the browser for input type=date and other similar elements based on web site’s language, not the other way around. That’s my preference.
Okay, I already have preferred languages selected: English and Turkish. If I visit a `<html lang="tr">` page I should see date inputs rendered in Turkish culture right? That's not the case unfortunately.