I was going to vehemently agree and start ranting, but I see you've linked a submission that already has enough of me ranting! Ha. I'll only add that sometimes it annoys me so much I want to create my own 'Britcha' out of spite.
Perhaps if I ever run some really popular site I shall: 'select all pubs', 'arrange the squares in order of social class', 'type the word that describes an ordered collection of people waiting for something'.
No it wouldn't. Just like American sites, there are very many .co.uk sites that (intentionally) serve a world audience.
Different language & currency support is fairly common, and where not present it's usually because other markets aren't deliberately served. I18n/l10n ought to extend to captcha too.
Perhaps if I ever run some really popular site I shall: 'select all pubs', 'arrange the squares in order of social class', 'type the word that describes an ordered collection of people waiting for something'.