In Hungary we don't even have a separate name for 11 and 12, just 10 + 1 and 10 + 2. But at least we messed up the billions, it's called 'milliárd' and the trillion is 'billió'. We were so close to making it perfect.
No, you folks did it correctly. It's everyone else who messed up: How big is a billion?
1 million squared is a billion. 1 million cubed is a trillion. (1 million)^4 is a quadrillion. And so forth with pent-, sex-, sept-, oct-, etc. Milliard, billiard, trilliard, etc. slot in between the powers of one million.
I think that's fairly normal in Europe, isn't it? In Germany we have Million, Milliarde, Billion, Billiarde instead of million, billion, trillion and so on, too.
I might be remembering this incorrectly, but a billion in Europe used to be a million million, and we would count in thousands of millions first, as opposed to a billion now being a thousand million.
I can't remember whether a trillion was a million (old) billion, or whether it was a billion billion.