Constructed Language

A planned or constructed language—known colloquially as a conlang—is a language whose phonology, grammar, and/or vocabulary has been consciously devised by an individual or group, instead of having evolved naturally. There are many possible reasons to create a constructed language: to ease human communication (see international auxiliary language and code), to give fiction or an associated constructed world an added layer of realism, for linguistic experimentation, for artistic creation, and for language games.

The expression planned language is sometimes used to mean international auxiliary languages and other languages designed for actual use in human communication. Some prefer it to the term "artificial", as that term may have pejorative connotations in some languages. Outside the Esperanto community, the term language planning means the prescriptions given to a natural language to standardize it; in this regard, even "natural languages" may be artificial in some respects. Prescriptive grammars, which date to ancient times for classical languages such as Latin and Sanskrit are rule-based codifications of natural languages, such codifications being a middle ground between naive natural selection and development of language and its explicit construction. The term glossopoeia is also used to mean language construction, particularly construction of artistic languages.