An auxiliary language is one not the primary or

native language A first language (L1), native language, native tongue, or mother tongue is the first language a person has been exposed to from birth or within the critical period hypothesis, critical period. In some countries, the term ''native language'' ...

of a community. It may refer to: *

Interlanguage An interlanguage is an idiolect developed by a learner of a second language (L2) which preserves some features of their first language (L1) and can overgeneralize some L2 writing and speaking rules. These two characteristics give an interlangu ...

, an idiolect that has been developed by a learner of a second language *

International auxiliary language An international auxiliary language (sometimes acronymized as IAL or contracted as auxlang) is a language meant for communication between people from different nations, who do not share a common first language. An auxiliary language is primarily a ...

, a planned language constructed for international communication, such as Esperanto or International Sign * Minority language, a secondary language that has official recognition *

Sacred language A sacred language, liturgical language or holy language is a language that is cultivated and used primarily for religious reasons (like church service) by people who speak another, primary language in their daily lives. Some religions, or part ...

, also called ''liturgical language'' or ''initiation language'', used in religious services *

Lingua franca A lingua franca (; ; for plurals see ), also known as a bridge language, common language, trade language, auxiliary language, link language or language of wider communication (LWC), is a Natural language, language systematically used to make co ...

, a language used to facilitate communication between groups without a common native language

See also