Sign languages are visual languages that use hand shapes, facial expressions, and body movements to convey meaning. They are primarily used by the Deaf and Hard of Hearing communities, allowing for effective communication without spoken words. Each sign language is unique and often tied to specific cultures and regions. For example, American Sign Language (ASL) is distinct from British Sign Language (BSL), despite both serving similar purposes in their respective communities. Sign languages are fully developed languages with their own grammar and syntax, making them rich and expressive forms of communication.