Children can be difficult to understand, but caregivers must persist and encourage self-expression. Develop consonant sounds. 6-8 months Develop doubled consonants. 18-24 months Rapid increase in language acquisition. 36-48 months Refinements of grammar, vocabulary and meaning.
Receptive proficiency is always much more advanced than productive language.
Children always understand more of what is being said to them than what they can produce on their own.