Since everyone was curious, the only way I found for yt to not use (in my case german) user-created titles was to go into Android settings -> language, change you whole device language to English (assuming it changes English titles)
Thanks @TeamYouTube big fan
Also read online that you are supposed to be able to change it in the language settings on http://my.account.google.com , might work for others but only changed browser language and not the yet app