DS's grasp language and his vocab is excellent, but he has always had trouble saying some sounds. He has always replaced "sh" with a very odd nasal sound (very cute though!) and is now also replacing 'sh' with 'th' - and sometimes still with the nasal sound, depending on the word.
I haven't been worried about it, but it did occur to me that there will come a time when it wont be 'normal' for him to mispronounce anymore...and I wondered when that time is?
TIA