I find it more curious that the languages I know best tend to have special words for 11 and 12 that don't follow the same logic as the rest. Eleven and twelve i

I find it more curious that the languages I know best tend to have special words for 11 and 12 that don't follow the same logic as the rest. Eleven and twelve instead of one-teen, two-teen or something. And that even leads to things like a teenager being age 13+. In German it's the same elf + zwölf and then it continues with dreizehn, vierzehn etc. My guess is that it is somehow related to the fact that a dozen is a thing but I'm curious where it comes from. In French it goes all the way up to 16 (onze, douze, treize, quatorze, quinze, seize) before we end up with dix-sept for 17. French has always been the most peculiar to me as there's stuff like 82 being quatre-vingt-deux (4*20+12). And then there's languages like Vietnamese that happily start with 10+1 from the get go (mười một, mười hai, mười ba). Fascinating stuff :)