[atodorov99]

Humans don't piggyback on language (assuming you mean) for intelligence and emotions. Emotions predate language by miles and they don't even have to be consciously thought of, much less expressed through language. Doubly so for people who do not have an inner voice and do not even use a language to think. Body language exists as the simplest example of this.

As for intelligence I honestly believe the mind uses whatever tools it sees fit for a task. Sometimes when you think about a problem it is through words, sometimes it is through visuals and sometimes it is just felt.