For the last several decades, every English speaking country has used the short billion (1e9).

Yep, even the BBC surrendered to the Americanism.

According to Wikipedia's summary of the situation, the French are to blame for the ambiguity - no surprises there! ;) But if we're going to avoid Americanisms, the better way is simply to use the word 'milliard', which makes perfect, unambiguous sense in any language.

Except that it's a terrible word because milli means thousand, and ard just means a grammatical modification.

So all that accomplishes is conflating thousand with million with billion. (Of course "million" is already a conflation of "thousand"!)

Oh, good point... Right, back to the drawing board - how about "kilocount" for a thousand, "megacount" for a million, and "gigacounts" for a (short) billion? The prefixes were apparently resurrected from the Greek for use in the metric system, but haven't had any other contradictory meanings as far as I can tell. I know I'm mixing up the Greek and Latin roots with "-count", but "kiloarithmos" is two syllables too many!