4 - "Are we talking about an activity for the deaf, or for special education, that have very particular characteristics and for which there are specially trained teachers, but that does not make much sense to be shared by "normal " teachers ?"
Although the gestures come mainly from this original source, the use of YoGoTe signs is not limited to deaf people and their collective (if it were only only for the fact that they use the sign language of his country, not those of Gestuno which are not a language, but only a collection of gestures, which is a very different thing). Fortunately, these signs are open to be used by people who speak any language in the world, as an additional international communication tool. they allow to do school activities for multilingualism and language learning.