What is Language Acquisition?

Language acquisition is the process by wich humans acquire the capacity to perceive and comprehend language.  Language acquisition usually refers to first-language acquisition, which studies infants' acquisition of their native language, whether that be spoken language or signed language. It can also include bilingual first language acquisition, which refers to an infant's simultaneous acquisition of two native languages, though it can also refer to bilingual first language acquisition, which refers to an infant's simultaneous acquisition of two native languages.