unfortunately no, (well yes but you can't write in sign language, but I speak two types of sign languages: BSL (stands for British sign language), and Makaton which is a simplified form of sign language, used mainly by younger sign users and those with learning difficulties. I can also write in and read egyptian hieroglyphics, but that's no use in communication either.)
So the long and short of it is yes, but not in a way that's of any use in communication here