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 i

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.