My son is a month away from turning 2 years old. He knows about 15 words and uses only about 5-7 words on daily basis. Does he have a speech delay?
Children this age are quite diverse in their speech production. Some toddlers are chatting up a storm by this age, and others are simply quieter. It's likely reflective of their blossoming personalities. The more important thing is comprehension. Does your son seem to understand most everything you say? He should. But since I can't evaluate your son, it's important that you ask his pediatrician for an evaluation of his speech and language. In the meantime, encourage him to use his words to express his thoughts and needs -- but don't pressure him. Help him to have fun with sounds!