British/American language preference selection
I think it would be nice if we could select in our profile if we speak/write British English or American English. That way the translations which differ (e.g. "petrol" vs "gasoline" could be flagged and the alternatives could be stored, and alternative versions of the translated works could then be presented depending on the reader's preference
I think the current practice of accepting multiple versions is fine.
If you want to make the distinction, then how far down the line do you go? India has the largest population of English speakers, and some quite distinct phrasing. What about Australia, New Zealand, S. Africa, Kiripati, other commonwealth countries? The Scots, Welsh, Irish, Geordies, Doric speakers, etc., all have local variants.
It's a nice idea, but I don't see it being practical.