American Sign Language (ASL) is largely a visual language used by the Deaf community. It is mainly used in the US and parts of Canada and, to a small extent, in West Africa and Southeast Asia. ASL is the native sign language of around 250,000-500,000 persons in the United States, which is a sizable amount. Alabama, Colorado, Georgia, Indiana, Maine, Massachusetts, Montana, Oklahoma, Rhode Island, and Utah are the 10 states in America that legally accept ASL as the official language of deaf people. Some experts believe that ASL is developed based on French Sign Language. Yet, Martha’s Vineyard Sign Language and other local sign languages were also influential. American Sign Language, or ASL, has its syntax and grammar rules. It changes over time and has common linguistic properties like other languages. ASL consists of various kinds of facial expressions, specific signals, body motions, physical space use, one-handed fingerspelling, and signs that depend on hand shape, palm orientation, location, and direction.
Great explained difference between ASL & BSL.