1) Research shows that young children can learn two languages simultaneously when both are used in daily interaction at home. The early childhood years provide an optimal period for language learning through social interaction and exploration of their environment. 2) As children develop, their language acquisition mirrors that of their first language, initially using formulaic expressions and telegraphic speech before developing more advanced grammar. 3) Interaction with caring adults who adjust their speech to be clear, repetitive and expand on the child's meaning helps children learn language naturally as they would their first language.