DS (13.5 months) doesn't really have any words - he says "mama" when distressed, babbles "dadadada" when he is happy, and when we point to a book, he says "boo" (can't make the "k" sound). We've been teaching him simple sign language since 9 months but he has never signed. He follows one-step directions fairly well. I'm not worried per se but I am curious as to whether this is considered a bit behind.
Re: Speech and sign language