4-20-10 (quatre vingt dix) is weird for non-French speakers, as "siedemdziesiat" is weird to non-Polish speakers, or any other word in a foreign language. To u

4-20-10 (quatre vingt dix) is weird for non-French speakers, as "siedemdziesiat" is weird to non-Polish speakers, or any other word in a foreign language. To us French this is a word like others, it's not like we are calculating in our heads. Belgians have "septante" which is more logical but they do not calculate either.