PhilippeO
Banned
Um, why aren't they? It'd be helpful if you could first define what language and writing are.
Um, you have to ask linguist for that.
my understanding, which totally amateur, "Symbol" is not writing. So thing like "traffic sign" is not considered writing. some hand signals like " open hand for stop " also not considered sign language. Also in my mind, based on totally unreliable boyhood novel, some indians which totally different language, had some basic "warning sign" put on the ground or "hand gesture" when two hunter accidentaly meeting, they not usually considered language.