I guess I could look it up somewhere, but if the British don't call 1,000,000,000 a billion, what do you call it?

Incidentally, the right "breaks" in numbering here in Japan are
10,000 - one man (pronounced mahn - long ah)
100,000,000 - one oku

so it goes ones, tens, hundreds, thousands, man, ten man, hundred man, thousand man, oku.

This endeth today's linguistic diversion.