[gkya]

In french it's base ten only. AFAIK it's just the names, particularly in France, that are a bit confusing. I don't think francophones think of quatre-vingts as 20 20 20 20, but as 80. Just like english is not base-12 because its eleven and twelve, and not oneteen and twoteen.

[andreareina]

Just the names doesn't account for 80 + 10, 80 + 11, ..., 80 + 19.

[gkya]

Isn't it like quatre-vingts and ten, eleven, etc?

[jacobolus]

97 is pronounced like "four-score-ten-seven".

[jacobolus]

Who is downvoting this, and why? Quatre-vingt-dix-sept is literally the French version of four-score-ten-seven.

[kzrdude]

but with notes:

- quatre-vingt is the name for 80 - dix-sept is the name for 17

so we could also say it's eighty-seventeen.

[ambicapter]

quatre-vingt, quatre-vingt-un, quatre-vingt-deux,...,quatre-vingt-dix, quatre-vingt-onze, quatre-vingt-douze,...quatre-vingt-dix-neuf, cent,...