Editing Natural language (section)

== International constructed languages ==
{{Main|International auxiliary language}}
Being constructed, [[International auxiliary language]]s such as [[Esperanto]] and [[Interlingua]] are not considered natural languages, with the possible exception of true native speakers of such languages.<ref name="Gopsill, F. P. 1990">Gopsill, F. P., "A historical overview of international languages". In ''International languages: A matter for Interlingua''. Sheffield, England: British Interlingua Society, 1990.</ref> Natural languages evolve, through fluctuations in vocabulary and syntax, to incrementally improve human communication. In contrast, Esperanto was created by Polish ophthalmologist [[L. L. Zamenhof]] in the late 19th century.

Some natural languages have become organically "standardized" through the synthesis of two or more pre-existing natural languages over a relatively short period of time through the development of a [[pidgin]], which is not considered a language, into a stable [[creole language]]. A creole such as [[Haitian Creole]] has its own grammar, vocabulary and literature. It is spoken by over 10 million people worldwide and is one of the two official languages of the [[Republic of Haiti]].

As of 1996, there were 350 attested families with one or more [[native speakers of Esperanto]]. [[Latino sine flexione]], another international auxiliary language, is no longer widely spoken.