Funniest thing for me as a bilingual French is people ~~butchering~~pronouncing French words like hors d'oeuvre or whatever. I mean it's funny but okay, that's both no big deal and you can always educate someone and give them the real French pronunciation if they absolutely wanna sound posh.
But then I'm always so torn when somebody has a clearly French name but again, their pronunciation is atrocious. Like, I try to just ignore it, but sometimes I can just imagine myself jumping at them and screaming how they are pronouncing it wrooooooong, hahaha!