Understands, But Can't Speak

[tomandtish]

Generally, I'd let them read and write, if they're physically capable of such; "cannot speak", IME, is usually a degree of physical limitation.

Take, for example, R2-D2. He cannot *speak* Basic; he is incapable of forming the sounds with his limited Vocabulator. But he can read it and write it (output on the X-wing's screen).

Interesting question. Is he writing in Basic, or is the computer translating for him?

(He obviously understands it).