Earlier quoted context omitted.
My computer is set to English even though I'm German, and sometimes Youtube will treat me to this really uncanny machine voice with really weird phrases because it auto-translated some German video or advert. Lidl is worth it, ja!
Same here. My native tongue is German, I live in Switzerland, but my settings on all devices are English. I do this on purpose, because I find everything is more searchable. I don't even know any German terms for most technical things I might search or look for. So even if the automatic translations were good, which they aren't, this would be a non-feature. My browser already tells them what my preferred language is.…
Now it's a mix of German and English, e.g. 1 heading is "Spiele-Bestseller", and the next is "Best selling apps". And prices displayed as "28,00 CHF" (correct would be to use the decimal point).
Like Van Halen's brown M&Ms, it just shows how sloppily this thing is programmed: https://www.snopes.com/fact-check/brown-out/