Re: I have a deaf and blind friend.
There is a special language for the deaf blind, at least here in Spain, called dactile language or something like that. No idea if this applies to other countries but basically there are gestures for each letter and then this person can touch your hand, though as for my exprience this system is overly complicated for a novice.
Best option probably is to use a Braille display to communicate or something, at least in the short term.
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