> French of course also have many original grammatical torture instruments.
For me it was when I had to realize that for the French, every number larger than what they can count with their fingers becomes a small algebra problem. quatre-vingt-dix-neuf ... four times twenty plus ten plus nine makes 99.
I recently got curious about the roots of this, and it turns out it’s from Celtic languages. All the Celtic languages count in base 20, and they were widespread across continental Europe before the Romans introduced Latin to their conquests and then the Germanic tribes brought the Germanic languages in.
Celtic remained a strong influence around modern France, Belgium, the Netherlands so we end up with French counting partially in 20s, even though continental Celtic languages are extinct (Breton, spoken in north west France is an insular Celtic language, more closely related to Celtic as spoken in the British isles and Ireland.)
I don’t know how Danish got base 20 counting though. Must have more reading to do.
Yeah, you can take an other locale and use "nonante neuf" instead. People generally take "quatre-vingt-dix" as a single token, they don't actually think about it in a compound perspective. Just like onze, douze, treize, quatorze, quinze, seize, where -ze stands for ten, so it's "n + 10". But in this case it's not synchronically as obvious as this composition is analyzed from morphological point of view, -ze in itself is not attached to any autonomous token in French. If anything French will rather lead to analyze numbers in terms of "k*10+n" instead, unlike German.
Well if you like that, you'd love Danish numbers, where 99 is nine and half (before) five times twenty, or »nioghalvfemsindstyve« (or more commonly shorten to »nioghalvfems«).
I suspect that French people aren’t really thinking about this when they speak, just like in English we aren’t usually consciously aware that “ninety” is derived from “nine”. It’s obvious when you stop to think about it, but for the most part “ninety” is just its own separate token in our mind, and so is “quatre-vingt-dix” to the French.
Swiss French seems to have regularized some of this in a sensible way? Indian English does much the same with some things; not strictly “correct” English, to the extent those words don’t exist in British or American English, but I can’t argue that it doesn’t make more sense or isn’t more consistent so I never argue the case. I generally view those regularizing pressures from non-native sources as a positive thing for languages.