Another random headcannon (NSFW I think?):
I like the idea that everyone thinks France is very naive and ladylike because every time they make any kind of sexual innuendos around her she doesn’t get it, but then she reveals she’s actually incredibly crass, she just doesn’t use innuendos (unless she’s speaking her own language), kinda like this:
America, talking to Canada: so yeah, i totally got a taste of him last night-
France overhearing: you tasted him…? Who? Did you bite him? You’re not a child. Don’t bite people
Canada: ah… don’t worry about it maman-
Britain, who was also eavesdropping: they’re talking about sex, dear
France: ooooh I get it! Still gross, if you tasted his penis. I know that your father’s tastes like-
America: MOM STOP I DONT WANNA KNOW THAT!