Here are some key points:
* It's not a single language: There are hundreds of different sign languages, each unique to a specific country, region, or even community. For example, American Sign Language (ASL) is different from British Sign Language (BSL).
* Used by deaf and hard-of-hearing people: Sign languages are the primary means of communication for many deaf and hard-of-hearing individuals.
* Used by hearing people too: Many hearing people learn sign language to communicate with deaf friends and family, or as a second language.
* Used in formal and informal settings: Sign languages are used in schools, workplaces, government, and everyday life.
Examples of sign language use around the world:
* North America: American Sign Language (ASL)
* Europe: British Sign Language (BSL), French Sign Language (LSF), German Sign Language (DGS)
* Asia: Japanese Sign Language (JSL), Chinese Sign Language (CSL)
* Africa: South African Sign Language (SASL)
* Australia: Auslan
Important Note: Sign language use varies significantly across different countries and regions. The specific sign languages used and the level of acceptance and accessibility can differ widely.