There are perhaps three hundred sign languages in use around the world today. Deaf sign languages also arise outside educational institutions, especially in village communities with high levels of congenital deafness, but there are significant sign languages developed for the hearing as well, such as the speech-taboo languages used in aboriginal Australia. Scholars are doing field surveys to identify the world’sign language for autism pdf sign languages. Auxiliary sign languages, which are not native languages but sign systems of varying complexity, used alongside spoken languages.
Simple gestures are not included, as they do not constitute language. There are at least 25 sign languages in Africa, according to researcher Nobutaka Kamei.
Some have distributions that are completely independent of those of African spoken languages. 23 sign languages documented by Kamei have originated with or been influenced by them.