Tibetan Sign is the first recognized sign language for a minority in China. The Tibetan Sign Language Project, staffed by members of the local deaf club, was set up under the supervision of Handicap International in 2001 to create a standardized language, based primarily on the existing sign language of Lhasa, as a replacement for the regional sign languages of Tibet. For example, the deaf of Nagqu have a well developed vocabulary for livestock, while those of Lhasa have more specialized vocabulary for urban life. The standard was announced by the Chinese government in 2004.
^a Sign-language names reflect the region of origin. Natural sign languages are not related to the spoken language used in the same region. For example, French Sign Language originated in France, but is not related to French. Conversely, ASL and BSL both originated in English-speaking countries but are not related to each other; ASL however is related to French Sign Language.
^b Denotes the number (if known) of languages within the family. No further information is given on these languages.