According to Wiki Baby talk is a type of speech associated with an older person speaking to a child. It is also called caretaker speech, infant-directed speech, child-directed speech or “motherese”.
According to Dunstan, Baby Language is a theory about infantile vocal reflexes as signals, in humans. The theory is that across cultures and linguistic groups there are five sounds, each with a meaning, that are used by infants before the language acquisition period.
Latins tend to think that these sounds revolve around the vowel sounds Ah, Eh, Ee, Oh, Uh, and basic constants such as Ma-ma, for mother, Pa-pa, for father, etc.[:de]Our Professionals are working on updating this introduction regarding Baby Sign Language