"The French Sign Language (LSF) family is a language family of sign languages which includes French Sign Language and American Sign Language, among others.The FSL family descends from Old French Sign Language, which developed among the deaf community in Paris. The earliest mention of Old French Sign Language is by the abb\u00E9 Charles-Michel de l'\u00C9p\u00E9e in the late seventeenth century, but it could have existed for centuries prior."@en .