L’académie is basically a bunch of French teachers that want to stop the natural language shifting in French that occurs in every single language. It’s really not anything more than that. No one in France cares about what they say lol. French actually uses a ton of loanwords where they just simply pronounce them as if they were French words. For a topical example, in English, literally everyone uses the word hentai, pronounced different from in Japanese, for anime porn; anime is also the same type of loan word.