My now 3yo son didn't talk til 2-2 1/2, with my almost 2yo daughter I started much earlier with 'making' them talk. What this technique is you never pre-empt them by just giving them the juice or the toy they are grunting for. You ask them 'you want the bear?' or 'I don't understand what you want, can you tell me/use your words? What are you pointing to?' You do this in a very upbeat/positive way and anytime they do use a word you praise 'oh, thank you for telling me you wanted the bear, that really helps me when you use your words'. And continually repeating everything, 'here is the bear, what a fun bear, susie got the bear she wanted because she asked for the bear'. Then when the have the word 'bear' down, you add another word to it ' here is the brown bear you asked for', you want to stay one word ahead of them.
It's a little tiring sometimes to talk so much, but my son definetly needed it and my daughter is way ahead of the scale in speech.
My son was shy about talking, once he got it, and sometimes still I have to repeat what he says or he repeats what I say. He is just trying to 'get it'. He was checked out w/ early intervention and he is fine, and he is not slow or less inteligent. Words with 2 consanants are hard like 'flag' it would come out 'bag' so i work with him still, we sound it out, having fun, 'fffff lllag' and he is getting it.
good luck, stay positive, lots of kids don't talk til 3, but I think some need more help/direction.