I don't think its a good idea at all, it could confuse people, and whatever you put ontop couldn't match the studs.
Looks nice, but very useless and confusing.Also, what's with the broken Engrish in OP?
That's interesting
He's deaf. I can't believe you haven't noticed this already. He mentioned it multiple times.
Deafness affects the sound of speech, not the ability to learn grammar and typing.