My two-year-old is still not talking yet. My wife is worried her has a problem. Should we consult a doctor?

I feel your concern. As a 2 yo toddler, she should be able to blabber or talk incessantly. I will suggest for u to bring child to seek medical opinion and to even refer to a speech therapist. It might turn out to be that she is a late bloomer. However, to ease the worries of parents, I feel you should seek professional help if in doubt.