Hi! I am new to this forum. I have concerns about my son who will be 21 months saturday. His vocabulary consists of moma or maw ( not used for the right person), zom mo (some more), keke ( cat or small dog), hi, nene ( for cup and was also for his bottle) and no ( for yes and no). The rest of his communication is as if he is talking a foreign language. It can not be understood and 98% of the time, nothing can be deciphered from it. At 8 months he could say unhuh but after 1-2 months that completly disappeared from his talking. He also used to be able to say bye, yight (for light), daddy which also after a month or so no longer existed. It is like he never said the words at all. He seems to be in his own world sometimes but he does show affection. And only about 5% of the time will he point or gesture toward something he wants. If you let him outside, he just wonders around aimlessly.He makes very little eye contact and the only toys he plays with are his cars about 20% of the time.He has 2 older sisters that he so called plays with sometimes. Other kids, he just looks at them and goes on about his way. Should I be concerned?