Simplify the following text for a Grade 7 native English-speaking person.
Original: While the term `` Pope '' ( Latin : papa `` father ' '' ) is used in several churches to denote their high spiritual leaders , this title in English usage generally refers to the supreme earthly head of the Catholic Church .
Simplified: Pope ( Latin : papa `` father ' '' ) is the name several churches give to their highest spiritual leader . In English usually means the head of the Roman Catholic Church .