I also find this annoying, but this is due to websites ignoring the browser preferences. The browser supports specifying multiple languages and the website could select the one that the content is native in.
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.