I'm not seeking to 'dictate' anything, and I certainly don't want to go down the French route. And I agree, a lot of imported words are useful, including some American ones. It's just that I get a tiny bit irritated when Americanisms are adopted not because they are useful ('commuter' is the example I always think of), but just because they sound sort of cool. (Yes, I know.) I don't like to be reminded of our linguistic servitude. If I were a Welsh-speaking Welshman, I wouldn't mind 'ambiwlans' or 'tacsi'. But I would mind being forced to speak English.
However, point taken. I shall try to desist in future from these obsessional postings about creeping Americanisms.