The following list of notable constructed languages is divided into auxiliary, ritual, engineered, and artistic (including fictional) languages, and their respective subgenres. All entries on this list have further information on separate Wikipedia articles.
International auxiliary languages (IAL) are languages constructed to provide easy, fast, and/or improved communication among all human beings, or a significant portion, without necessarily replacing native languages.
The most popular auxiliary language ever invented, including, possibly, up to two million speakers, the highest ever for a constructed language and the only one to date to have its own native speakers (approximately 1,000).[1]
A major effort to systematize the international scientific vocabulary. It aims to be immediately comprehensible by Romance language speakers and to some extent English speakers.
Zonal auxiliary languages are languages created with the purpose of facilitating communication between speakers of a certain group of related languages. Unlike international auxiliary languages for global uses, they are intended to serve a limited linguistic or geographic area. Examples include Pan-Slavic languages, Pan-Romance languages and Pan-Germanic languages.
Controlled natural languages are natural languages that have been altered to make them simpler, easier to use, or more acceptable in certain circumstances, such as for use by people who do not speak the original language well. The following projects are examples of controlled English:
Seek to limit the language to a given list of common-use words and terms in order to make it simpler to foreign learners or other people who may have difficulties.
Engineered languages are devised to test a hypothesis or experiment with innovative linguistic features. They may fall into one or more of three categories: philosophical, experimental and logical.
Some experimental languages were developed to observe hypotheses of alternative linguistic interactions which could have led to very different modern languages. The following two examples were created for Ill Bethisad, an alternate history project.
Based mainly on Latin and Greek, with influence from German, English and Romance languages. Contains eight moods, including Sidis's own strongeable, and has a base twelve number system.
There is a version of Wikipedia in each of the following nine constructed languages. Eight of these languages are ILAs (international auxiliary languages), while Lojban is an engineered language. Until 2005, there were also versions of Wikipedia in the constructed languages Toki Pona and Klingon, but these have been deleted.[10]
^Robert Phillipson. English-Only Europe? 2003. p. 172: "several thousand children worldwide are growing up (in over 2000 families) with Esperanto as one of their mother tongues"
Reprinted as: ——— (2010). In the Land of Invented Languages: Adventures in Linguistic Creativity, Madness, and Genius. New York: Spiegel & Grau. ISBN9780812980899. OCLC436030223.