My son is going to be 4 yrs on May.. He was in playschool for a year but his teachers were having a really hard time with him because he doesn't talk to them nor the other kids.. He has just joined nursery and the same thing is happening over there too.. I don't really know whether he's too shy or is it because of the language problem,we do speak to him in english and Hindi, at first we thought maybe it might be the language but then I realized that he doesn't greet anyone who greets him so I don't think it's the language.Should I send him to any kind of professional classes.please I am begging someone to help me because I am really frustrated..

Have you had his hearing checked?
Does he have brothers and sisters?

His hearing is perfect.no siblings

He needs to be examined by a Physician.

This is not a question about teens and I have asked that it be moved.

Babies learn to talk because we talk to them. Your little guy needs to be checked out asap.

It is not that he doesn't talk at all,he is very talkative and playful it's just outside he doesn't talk to anybody

See his doctor.

Being that he is talkitive at home but not outside makes me think he may have anxiety issues. Even shy children will say a word or two after some time