Well the translator was made in collaboration with James Cameron's production company, Lightstorm Entertainment, and Dr. Paul Frommer, creator of the Na’vi language for Avatar, "to acquire audio recordings of spoken Na’vi words for the translator."
"The Na’vi have no written language, so the translator will be a helpful tool for any human visiting Pandora."
So, it's about as canon as it can get I guess.
Plus, look. They're colorful! :ears: