Portal:Constructed languages
Introduction

A constructed language (shortened to conlang) is a language whose phonology, grammar, orthography, and vocabulary, instead of having developed naturally, are consciously devised for some purpose, which may include being devised for a work of fiction. A constructed language may also be referred to as an artificial, planned or invented language, or (in some cases) a fictional language. Planned languages (or engineered languages / engelangs) are languages that have been purposefully designed; they are the result of deliberate, controlling intervention and are thus of a form of language planning.
There are many possible reasons to create a constructed language, such as to ease human communication (see international auxiliary language and code); to give fiction or an associated constructed setting an added layer of realism; for experimentation in the fields of linguistics, cognitive science, and machine learning; for artistic creation; for fantasy role-playing games; and for language games. Some people may also make constructed languages as a hobby, or in connection to worldbuilding.
The expression planned language is sometimes used to indicate international auxiliary languages and other languages designed for actual use in human communication. Some prefer it to the adjective artificial, as this term may be perceived as pejorative. Outside Esperanto culture, the term language planning means the prescriptions given to a natural language to standardize it; in this regard, even a "natural language" may be artificial in some respects, meaning some of its words have been crafted by conscious decision. 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 naïve 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.
Conlang speakers are rare. For example, the Hungarian census of 2011 found 8,397 speakers of Esperanto, and the census of 2001 found 10 of Romanid, two each of Interlingua and Ido and one each of Idiom Neutral and Mundolinco. The Russian census of 2010 found that in Russia there were about 992 speakers of Esperanto (the 120th most common) and nine of the Esperantido Ido. (Full article...)
Selected language

Neo is an artificially constructed international auxiliary language created by Arturo Alfandari, a Belgian diplomat of Italian descent. The language combines features of Esperanto, Ido, Novial and Volapük. The root base of the language and grammar (in contrast to that of Esperanto and Ido) are closely related to that of the French language, with some English influences.
The first Neo draft was published in 1937 by Arturo Alfandari but attracted wider attention in 1961 when Alfandari published his books Cours Pratique de Neo and The Rapid Method of Neo. The works included both brief and complete grammar, learning course of 44 lectures, translations of literary works (poetry and prose), original Neo literature, scientific and technical texts, idioms, detailed bidirectional French and English dictionaries. The total volume of the publications was 1304 pages, with dictionaries numbering some 75 000 words. Such a degree of details was unprecedented among constructed languages of the time.
The language stands in the tradition of international auxiliary languages such as Esperanto or Ido, with the same goal: a simple, neutral and easy to learn second language for everybody. Neo attracted the interest of the circle around the International Language Review, a periodical for IAL proponents whose publishers co-founded the international Friends of Neo (Amikos de Neo) with Alfandari; the organization also published its bulletin, the Neo-bulten. For a few years it looked like Neo could give some serious competition to Esperanto and Interlingua. Find out more...
Did you know...
...that Adjuvilo, although it was a fully developed language, was merely created to help create dissent in the then-growing Ido movement?
...that Winston Churchill initially supported Basic English as an international language, but was put off when he was told that "blood, toil, tears and sweat" translates as "blood, hard work, eyewash and body water"?
...that Kēlen is a constructed language that has no verbs, but still is able to express anything?
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Web resources

Some Internet resources relating to constructed languages, by Richard Kennaway
UniLang.org
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Wikipedia in constructed languages
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