Funny. I have the opposite problem. I have a German IP, my OS/region/locale is set to American English, and sites regularly give me the German version even if I don't want/need it and even if I've previously been to the site and set it to English. MDN is the biggest offender for me right now because I use it nearly every day, and every single time I go to the damn site it's in German and I don't want it in German.