I checked other, but mostly because I wanted to check the cos option in a cos poll. I couldn't resist the shiny!

I didn't know about Grenada, but I'm not shocked.

As for other countries: My dad likes to point out that Italian doesn't even have a phrase to describe "thanksgiving". Then we wound up in Montreal on Canadian Thanksgiving and learned the Quebecois term for it: Action de grace. Thus we could now guess such a term in any other Romance language.