A: One easy way to reduce your stress as a parent is to learn what normal developmental milestones are. Often, we compare our kids to others on the playground or playgroup and then become concerned.
According to the Denver Developmental Checklist, a milestone tracker that most pediatricians use, we expect a 15 month old to have 3 vocabulary words besides mama and dada. An 18 month old should say about 5-6 words that are understandable to his parents (and likely no one else). Then from 18-21 months, the light turns on and children start to pick up a new word every day. By age 2, they have 50-200 words that they can say.
Bottom line: your toddler is normal. Keep reading to him and point out vocabulary words when you are reading books, or shopping, or he is pointing and grunting to ask for something. Those are great teaching moments.