Varieties of ASL are used throughout West and Central Africa
Sierra Leonean Sign Language is a variety or descendent of American Sign Language (ASL) used in schools for the deaf in Sierra Leone, or at least in the capital Freetown. As in much of West Africa, the first schools for the deaf were founded by the American missionary Andrew Foster or his students.
^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.