My boy is 2 yrs old but he still not talking , not even papa or mama. He only speak his own langauge, doctor said his ear n nose hv no problem. How late will a baby start to speak?

My daughter was a relatively late talker, almost 3 yrs old before she spoke in complete sentences. She's now 8 and is a chatterbox! I think it should be OK, some kids are late talkers but they absorb a lot of information in other areas:)