Netflix (which holds the international rights) provides excellent English subtitles . Furthermore, Season 3 is the most bilingual season of the show. Because the villain is a British firm and Sigourney Weaver appears, roughly 30% of the dialogue is in English. The French agents speak English poorly, which is a running gag. You are supposed to cringe at their accents.
Each episode features a prominent French star playing a heightened, self-deprecating version of themselves. Jean Dujardin (Episode 1):
Jean Dujardin becomes too attached to a method-acting role, refusing to "leave" his character. Monica Bellucci