There is no particular universal definition of what bilingualism
is, although Bloomfield suggests that Bilingualism is “native- like control of two languages”.
Bilingualism is developed through
the process of language input, meaning that a language cannot sporadically appear in a child with out the particular language
being present in their environment. There is a variety of ways that bilingual language development can be acquired. There
can be two separate sources of input, for example, a child's mother could speak one language and their father could speak another
language. Both of the child's parents could speak both languages being learned, or one language could be learned at home and
the other learned at school.