A first language (also native language, mother tongue, arterial language, or L1) is the language(s) a person has learned from birth or within the critical period, or that a person speaks the best and so is often the basis for sociolinguistic identity. In some countries, the terms native language or mother tongue refer to the language of one's ethnic group rather than one's first language. Sometimes, there can be more than one mother tongue, (for example, when the child's parents speak different languages). Those children are usually called bilingual.
By contrast, a second language is any language that one speaks other than one's first language.
Read more about First Language: Terminology, Significance, On Multilinguality
Famous quotes containing the word language:
“I shall christen this style the Mandarin, since it is beloved by literary pundits, by those who would make the written word as unlike as possible to the spoken one. It is the style of all those writers whose tendency is to make their language convey more than they mean or more than they feel, it is the style of most artists and all humbugs.”
—Cyril Connolly (1903–1974)