The document summarizes key points about language development from birth to age 2. It discusses how language develops through social interactions, innate abilities, and imitation. As infants develop receptive language, they begin to understand words and respond to tone and pitch before meaning. Between 1-2 years, children start using expressive language through fast mapping and developing grammar intrinsically. Fostering language involves describing experiences, reading books, and engaging children in dialogue. Bilingualism and cultural influences are also addressed.