Bilingualism refers to using two languages fluently like a native speaker. There are different types of bilingualism including additive bilingualism which occurs when a second language is learned in addition to the first, and subtractive bilingualism where the first language is replaced by the second. Early bilingualism can be simultaneous, where two languages are learned from birth, or successive where a second language is learned after partially acquiring the first language in early childhood. Late bilingualism refers to learning a second language after age 6 or 7, especially in adolescence or adulthood. Passive bilingualism means understanding a second language without speaking it. Learning a second language provides cognitive benefits for children and promotes empathy, cultural understanding,