The price(not necessarily monetary) that you
pay for being a
foreign national while not understanding the local
language or customs.
Person1: I'm not sure what this charge is on my receipt.
Person2: Do you know how to dispute it in
french?
Person1: Nope
Person2: Well, it sounds they are charging you the expat
tax.
Non-monetary example:
When you've already said "what?" 3 times and finally you just agree.