Communication.

Continuing with the You know you are from Sweden when group on Facebook…

72. You answer a question with “mhm” and the questioner repeats their question thinking that you didn’t hear or understand. Resulting in you getting annoyed by the fact that they didn’t get that you ment “yes”.

Haha. That has happened me several times. But I don’t say “mhm”. I say “mmm” in order to show that I’ve understood/I agree. And many times the other (foreign) person has repeated what they’ve just said…