“Roman Catholic Church” has never been the proper name of the Church referred to by Catholics when they refer to their Church. The name of the universal Church is simply “the Catholic Church.”
The term “Roman Catholic Church” is a recent invention (past few centuries) and you’ll most often see and hear it used in English-speaking countries. Funnily enough, Protestants, not Catholics, who favor something called the branch theory of the Church’s development are usually the ones you’ll catch referring to the Catholic Church as the Roman Catholic Church.