In official Publisher like seven seas, They use Coherent Baby speech like :
Use suffix -sh when -ch appears (Ex : Much = Mush)
word L/R = W sometimes mixed up (ex : Delicious = Dewish, Welcome = Wewcome, Sorry = Sowwy)
2 Two-Word Phrases/Telegraphic Sentences (ex : "Daddy go," "mommy eat" "me...