My 19 month old has only 3 words he uses everyday.
But other days he'll say 'what you doing', and little phrases like that. He also just does A LOT of pointing (especially if his brother/sister has hurt him or done something naughty :/)
All three of my kids were late talkers, but once started the words just exploded out of them.
My 3 yr old (middle) seemed to take forever, but now is very articulate and will say sentences very carefully to make sure he says things right.