Swedish sign language used to be my native language due to having a deaf sister. After relocating to another part of the world and discussing languages, it surprised me how many times I had (have) to explain how "sign language" is not a language.
That said; it is amazing how many sign languages can come to similar conclusions due to "always trying to find the simplest way of explaining yourself".
That said; it is amazing how many sign languages can come to similar conclusions due to "always trying to find the simplest way of explaining yourself".