cochlear implant... cochlear implant... cochlear implant is all you think would solve it's problem. It has nothing to do with having hearing. get that out of ur mind.
children often use nonverbal gestures and signs before they begin to use words to communicate, why do you think baby's sign has become extremely popular recently, speech is most sure will come after the baby knows signs. I've read that babies won't have any speech delay if uses signs in the very beginning, and if parents speak and sign the same time with the baby, It would give a child a slight future verbal edge and language development.
Read my thread about sign lanugage, You'll get the whole point.