my baby is 18 months old and only speaks few words like mumma pappa dada bi only I am very worried

A. If your child is understanding every thing in the responses proper as a child should be having add the current is that your child is in then there is no problem with that by the age of 2 1/2 years also 2 to 2 1/2 years so currently is not a problem if your child is understanding anything otherwise it would require a check