As a French person who grew up going to a school in Belgium for a bit as a kid, I was quite amused by their numbers.

My thought as a 6 year old was "aw, are soixante-dix, quatre-vingt, and quatre-vingt-dix too complicated for you?"

Even now, while I think the French numbers make objectively no sense (even the countries that do count in 20s are at least more consistent than us), I can't help but find the Swiss and Belgian numbers "cute". Like "Baby's first 70 to 99".

And for whatever reason, I don't have the same opinion about 70-99 in English, Portuguese or Spanish.

Edit: just to be clear, I think my thoughts about it are absurd but they're too deeply engrained and decades old to shed completely.