She is the youngest of 4 early "speakers" this might be why I am a bit worried. To say "it's hot" for example she'll go "hi ho" if we ask her to repeat most words that do not include this letters she seems fine. Could it have to do with the fact she does not have all her teeth? sorry, clutching at straws here... She also seems to replace S by L quite often. her hearing seems fine, do I just need to be more patient?