Sorry if this belongs in the language thread instead, I wasn't sure!
In and around the time period of the French Revolution (more specifically 1792) what languages would it be plausible for the French to speak? I'm aware that centuries ago it was pretty normal for children to be multi-lingual, especially in Europe. The languages I'd thought of were French (obviously), English, German, and Italian. Not every French person would be able to speak all of those, of course, but overall, those seemed like they might be relatively common. I just need a way for the students of Beauxbatons, Durmstrang, and Hogwarts to have only one language in common with all three of them: English.

Am I totally off on this?
Thanks!