PHONOLOGICAL DISORDER

Does your child still say“pane” for “plane” or delete the weak syllable in a word saying, “nana” for “banana.” or ” tar for “star”.
if yes!!!!! than its a matter of concern.
because typically developing children have stopped using them.If your 4 year old still
saying, “wawa” for “water” or “bibi” for
“Biscuit” that would be considered delayed since most children stop using that process by the time they turn 3