Tijuana Sign Language is a deaf sign language of Mexico, but one unintelligible with, and apparently unrelated to, Mexican Sign Language.
Classification [ edit ]
posits that TSL is a language isolate (a 'prototype' sign language), though one developed through [1 ] stimulus diffusion from an existing sign language, likely of the French Sign Language family.
References [ edit ]
^ Wittmann, Henri (1991). "Classification linguistique des langues signées non vocalement." Revue québécoise de linguistique théorique et appliquée 10:1.215–88. 
Sign languages by region
American Sign Language
Extinct sign languages
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.