Try French, where you eventually have to start doing addition, multiplication, or both...
Quatre-vingt-douze = four times twenty plus twelve = 92
Quatre-vingt-douze = four times twenty plus twelve = 92
France, belgium/switzerland
70 -> soixante dix (60 + 10) -> septant (latin word like september for 7)
80 -> quate vingt (4 * 20) -> octant/huitant (come from huit = 8)
90 -> quatre vingt dix (4 * 20 + 10) -> nonant (latin word for 9)