He's not just a leader of Roman Catholics but of ALL Catholics in communion with Rome. Including Eastern Catholics. There are 23 Catholic churches of different rites and traditions all in communion with the Bishop of Rome, the Pope. Please update article to reflect this. There are a lot more Catholics in the Catholic Church than just Roman.  Certainly Roman is extremely valuable and important and wonderful too, but so are our Eastern Catholic faithful. See https://en.wikipedia.org/wiki/Eastern_Catholic_Churches