If you're friends speak dutch, write it in Dutch. It would be no different than any of us using a different nation style but writing it so we could read it. If you're going for the full effect, I tihnk it should be written in Russian, regardless of readability. You could always add a back label in Dutch so you and yours could read information about it.
Tap Room Hobo
I should have stuck to four fingers in Vegas. :o - marubozo's mom