It happens to me a lot too. Not that i have Chinese wife or something, but every other time i want to say something about Chinese cuisine, Chinese language or anything else with "Chinese" as an adjective, i spontaneously say "Japanese" instead. And just like Mr. Hunt have to apologize, realizing my gaffe the very next second or two.
But in my case there seems to be a plausible explanaition to that syndrome. My head remains preoccupied with Japan-related thoughts even when discussing other Asian cultures.