Canada, yes. We try as much as possible to use the correct spelling of words we've stolen from other languages- it at least gives a nod to the original owners. Americans are like 'Pfft, this old word? Hell no, we made it up! Sure, it sounds just like yours, and means the same, but we totally made it up ourselves- look! It's not even spelled the same! We've got "color", "advertize", "monetize", "monopolize", "bastardize", and "center", just to mention a few! And they're spelled proper, too!'

And those 'others' include all the Commonwealth countries, and former French colonies. Really, only the Americans spell it 'Center'- so they're the pretentious ones, going around making up their own 'special' version of English. Pretentious gits.