Hi ! This is the Frenchmann adding his $.02 ...

> I also remember reading that the French (maybe Denys will verify) also had
a
> base-20 numbering system. The article provided as proof the fact that the
> words for 40, 60, 80... are two-twenties, three-twenties, four-twenties...

In fact, the only remaning trace of that "feature" of the French language is
the fact that 80 is called "quatre-vingts" (loosely translated as "four times
twenty"). In the 17th century (sorry, folks, I was not there to confirm), 120
was similarly called "six-vingts". No idea about others .

Christian