@novimatrem
-writing/texting/drawing/typing
-sign language
-mimeing(acting out what you're trying to say)
-telepathy
-mouthing(try to physically form words but no voice ((only works with people who can read lips)))
An impossible scifi alternative would be to have a companion(friend, lover or benefactor) who knows you well enough to be able to ok detect subtle intent emanating from you and talk on your behalf.