Nothing. The world won’t come to an end, and you haven’t embarrassed yourself to the point where you can’t show your face again. Just apologize if that’s what’s called for, or laugh at yourself, make the correction, and count it as a learning experience.

Once I was in a restaurant and I wanted to ask the waiter for a “to go” box, however, I was speaking to my kids in English, and trying to think of what I wanted to ask for in Spa, and I promptly and incorrectly asked him for a “house to go”. He looked at me kind of funny, but he was very courteous, and didn’t laugh until I laughed.

I’ve committed other language faux pas as well over the years, all of which have been a learning experience, and if given enough time, will become a humorous story as well.