Black American Sign Language; BASL; African American Sign Language ; Prestige; Sprachattitüde; Linguizismus; Linguicism ; Dialektologie (Gebärdensprache) ; Dialectology (sign language) ; Language variation (sign language) ; Sprachattitüde; Linguizismus; Linguicism; Prestige; Sprachliche Unsicherheit; Linguistic insecurity ; History of language (sociolinguistics)