Our daughter is 20 months and she doesn't say much at all yet either. She says Dad, Mum, Nan, Gog = dog, Bub & a few others.
She has being saying on a couple of occasions a lot of words in a huge big sentence but I have absolutely no idea what she's been saying!!! I just look at it this way, at least she's trying!!!
We are meant to be doing a 20 month assessment 'cos she was behind with her talking on her 18 month assessment but we're not doing it.
How on earth can you force them to talk when they just don't want to??? Our daughter is very quiet & very serious. She definitely takes it all in though.
We're giving her until she's 2 before I do anything like taking her back to the CHN. In the meantime, I'm just trying not to stress too much!!! Easier said than done though.
love & hugs