My son is 15 1/2 months and although he seems to understand everything we say, e.g. get me your cup, go find daddy etc, he only says three words takk for thank you, out and 'that' for everything else. he can do animal sounds/ point to pictures etc but a friend told me their son was referred for speech delay at about his level/age. should we be concerned? it's almost. as though he is just not able to enunciate the words yet? I know there are loads of threads on here but any advice would be hugely appreciated. thanks all