Sorry, but this is unacceptable view. Just because it's not their major service, it does not mean that it has to be half-assed. They sure have the workpower (and I hope brains) to fix something as simple as using the correct dictionary with the correct domain.
And yes, it is a spell check, as they dont give you these type of suggestions if you put the correct word. If it was just suggestions, then when you type "rumors" Google would say "Did you mean gossip?" ;)