ASL (American Sign Language) is a complete visual language that uses hand shapes, facial expressions, and body movements to communicate. It is primarily used by Deaf and hard of hearing communities in the U.S. and Canada. ASL has its own grammar, syntax, and cultural context, distinct from spoken and written English.

ASL is a vital part of Deaf culture and identity. In digital and tech environments, including ASL is essential to making content and communication accessible. This includes sign language interpretation, captioned or visual content, and involving Deaf people in design processes. Recognizing ASL as a full language helps prevent exclusion and supports language equity in both physical and digital spaces.

ASL is not a universal sign language. Many countries and communities have their own sign languages. Within ASL itself, there are dialects and variations shaped by history, culture, and region. For example, Black Sign Variation (BSV) is a distinct form of ASL with its own grammar and expressions. Recognizing these variations helps avoid flattening the diversity within signing communities and supports better accessibility and disability justice practices.