Puerto Rican Sign Language (PRSL) is a variety or descendent of American Sign Language, which was introduced to Puerto Rico in 1907. It is not clear how far RPSL may have diverged from ASL, but Ethnologue speaks of bilingualism in ASL as well as speakers who know only PRSL.
^a Sign-language names reflect the region of origin. Natural sign languages are not related to the spoken language used in the same region. For example, French Sign Language originated in France, but is not related to French.