French is my native language. I am Belgian, we say 97 as "nonante-sept" literally "ninety-seven" while the French say "four-twenty-seventeen". They do write "quatre-vingt-dix-sept" , literally "four-twenty-ten-seven". French-speaking Swiss don't use "quatre-vingt" (80) at all and use "octante" instead.

"Quatre-vingt" (80) ethymology comes from celtic culture which was in base 20. It's a relevant example. Of course the French don't think "4x20+10+7" when they say "quatre-vingt-dix-sept". They think "quatre-vingt-dix" = 90 + 7 "sept". My point was that those languages reflects the fact that it's not obvious or natural for humans to count in base ten, it's a cultural concensus that took a long time to appear. Of course nowadays, the French and the Georgians count in base ten like everyone else. That is not the point I was making.