Serviette to me as well, but then I'm "northern", and deff kitchen roll!
We get napkins for parties etc but rest of the time, if needed, it's just some kitchen roll or tissues.
Also one that confused DW the other week, she was asking where I'd put something and I said "It's on the board in the kitchen", and she said "What board? it's not on the chopping board" and I had to think what she'd call it and I'm saying "on the side"..."side of what?" before I finally said "counter" and then she knew what I meant.
I was one of those occasional moments I'm sure we all have when you can't think how else to describe something yet you know it's not the word your trans-atlantic partner understands!