I am in the UK and I know what the word privilege means. That some privileges might be enshrined in law does not alter the fact that many / most aren't. I don't think the fact that men can walk wherever they want at night with practically zero fear of sexual assault, whereas that is really not true of women, is any less of a privilege because it has nothing to do with the law.
The problem is that people are too thick or lazy to understand that something like white privilege is all about white vs black, other things being equal. A person could have white privilege compared to her neighbour, yet in a dozen other ways, and overall, lack privilege.
Intelligence is a privilege, and perhaps I should spend more time acknowledging the privilege I have over people too thick or wilfully blind that they cannot see the previous paragraph's point.
HOWEVER, even if I am right in theory this doesn;t mean I am right in practice... maybe there are better ways of explaining it.
I'm not sure that simply calling it white advantage makes any difference. You could just as easily (and disingenuously) say "how do I have white advantage over my black neighbour? He is richer, has a job unlike me, is able bodied and male."