Hmm. I guess it depends on what sort of psychicness it is? What with Teo being able to understand him, despite the language barrier, I'd assume deaf people who know a sign language would have his psychic thoughts also directly translated into their language. And, again, since he can understand what Teo says, I don't see why he wouldn't be able to psychically understand non-spoken speech?

Unless the psychicness is tied to some kind of ultra-high-pitch frequency magic comprehension sound but that would be silly.