What's with the language detection on this site?

I've set my browser languages to "English (US)" first, and "Dutch" second. Instead of showing me the English-language version of the site, I get an absolutely atrocious auto-translation into Dutch instead (barely intelligible; way worse than Google Translate would produce).

Why are you even looking at my language preferences if you don't respect my preference, of getting English first? And maybe don't do secondary languages if you haven't done a tiny bit of quality assurance on the translation?