Philosophical language
Encyclopedia
A philosophical language is any constructed language
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...

 that is constructed from first principles
First principles
In philosophy, a first principle is a basic, foundational proposition or assumption that cannot be deduced from any other proposition or assumption. In mathematics, first principles are referred to as axioms or postulates...

, like a logical language
Engineered language
Engineered languages are constructed languages devised to test or prove some hypotheses about how languages work or might work. There are at least three subcategories, philosophical languages , logical languages , and experimental languages...

, but may entail a strong claim of absolute perfection or transcendent or even mystical truth rather than satisfaction of pragmatic goals. Philosophical languages were popular in Early Modern times, partly motivated by the goal of recovering the lost Adamic
Adamic language
The Adamic language is, according to certain sects within Abrahamic traditions, the language spoken by Adam and Eve in the Garden of Eden, i.e., either the language used by God to address Adam, or the language invented by Adam ....

 or Divine language
Divine language
Divine language, the language of the gods, or, in monotheism, the language of God is the concept of a mystical or divine proto-language, which predates and supersedes human speech.-Abrahamic traditions:...

. The term ideal language is sometimes used near-synonymously, though more modern philosophical languages such as Toki Pona
Toki Pona
Toki Pona is a constructed language, first published online in mid-2001. It was designed by translator and linguist Sonja Elen Kisa of Toronto....

 are less likely to involve such an exalted claim of perfection.

In most older philosophical languages, and some newer ones, words are constructed from a limited set of morphemes that are treated as "elemental" or fundamental. "Philosophical language" is sometimes used synonymously with "taxonomic language", though more recently there have been several conlangs constructed on philosophical principles which are not taxonomic. Vocabularies of oligosynthetic language
Oligosynthetic language
An oligosynthetic language is any language using very few morphemes, perhaps only a few hundred, which combine synthetically to form statements. It is contrasted to polysynthetic languages...

s are made of compound words, which are coined from a small (theoretically minimal) set of morpheme
Morpheme
In linguistics, a morpheme is the smallest semantically meaningful unit in a language. The field of study dedicated to morphemes is called morphology. A morpheme is not identical to a word, and the principal difference between the two is that a morpheme may or may not stand alone, whereas a word,...

s; oligoisolating languages, such as Toki Pona, similarly use a limited set of root words but produce phrases which remain series of distinct words.

Láadan
Láadan
Láadan is a constructed language created by Suzette Haden Elgin in 1982 to test the Sapir–Whorf Hypothesis, specifically to determine if development of a language aimed at expressing the views of women would shape a culture; a subsidiary hypothesis was that Western natural languages may be better...

 is designed to lexicalize and grammaticalize the concepts and distinctions important to women, based on muted group theory
Muted group theory
Muted Group Theory developed out of the cultural anthropology field, but more recently has been developed in communication mostly as a feminist and cross-cultural theory...

. Toki Pona
Toki Pona
Toki Pona is a constructed language, first published online in mid-2001. It was designed by translator and linguist Sonja Elen Kisa of Toronto....

 is based on minimalistic
Minimalism
Minimalism describes movements in various forms of art and design, especially visual art and music, where the work is set out to expose the essence, essentials or identity of a subject through eliminating all non-essential forms, features or concepts...

 simplicity, incorporating elements of Taoism
Taoism
Taoism refers to a philosophical or religious tradition in which the basic concept is to establish harmony with the Tao , which is the mechanism of everything that exists...

.

A priori languages are constructed languages where the vocabulary is invented directly, rather than being derived from other existing languages (as with Esperanto
Esperanto
is the most widely spoken constructed international auxiliary language. Its name derives from Doktoro Esperanto , the pseudonym under which L. L. Zamenhof published the first book detailing Esperanto, the Unua Libro, in 1887...

 or Interlingua
Interlingua
Interlingua is an international auxiliary language , developed between 1937 and 1951 by the International Auxiliary Language Association...

). Philosophical languages are almost all a priori languages
A priori (languages)
An a priori language is any constructed language whose vocabulary is not based on existing languages, unlike a posteriori constructed languages. Examples of a priori languages include Ro, Solresol, Mirad, Klingon, and Na'vi...

, but most a priori languages are not philosophical languages. For example, Quenya
Quenya
Quenya is a fictional language devised by J. R. R. Tolkien, and used in his Secondary world, often called Middle-earth.Quenya is one of the many Elvish languages spoken by the immortal Elves, called Quendi in Quenya. The tongue actually called Quenya was in origin the speech of two clans of Elves...

, Sindarin
Sindarin
Sindarin is a fictional language devised by J. R. R. Tolkien, and used in his secondary world, often called Middle-earth.Sindarin is one of the many languages spoken by the immortal Elves, called the Eledhrim or Edhellim in Sindarin....

, and Klingon
Klingon language
The Klingon language is the constructed language spoken by the fictional Klingons in the Star Trek universe....

 are all a priori but not philosophical languages: they are meant to seem like natural languages, even though they have no genetic relation to any natural languages.

History

Work on philosophical languages was pioneered by Francis Lodwick
Francis Lodwick
Francis Lodwick was a pioneer of a priori languages . He was a merchant of Dutch origin who lived in London...

 (A Common Writing, 1647; The Groundwork or Foundation laid (or So Intended) for the Framing of a New Perfect Language and a Universal Common Writing, 1652), Sir Thomas Urquhart
Thomas Urquhart
Sir Thomas Urquhart of Cromarty was a Scottish writer and translator, most famous for his translation of Rabelais.-Life:...

 (Logopandecteision
Logopandecteision
Logopandecteision is a 1653 book by Sir Thomas Urquhart, disingenuously detailing his plans for the creation of an artificial language by that name...

, 1652), George Dalgarno
George Dalgarno
George Dalgarno was a Scottish intellectual interested in linguistic problems. Originally from Aberdeen, he later worked as a schoolteacher in Oxford in collaboration with John Wilkins, although the two parted company intellectually in 1659.-Works:...

 (Ars signorum, 1661), and John Wilkins
John Wilkins
John Wilkins FRS was an English clergyman, natural philosopher and author, as well as a founder of the Invisible College and one of the founders of the Royal Society, and Bishop of Chester from 1668 until his death....

 (An Essay towards a Real Character, and a Philosophical Language
An Essay towards a Real Character and a Philosophical Language
An Essay towards a Real Character, and a Philosophical Language is the best-remembered of the numerous works of John Wilkins, in which he expounds a new universal language, meant primarily to facilitate international communication among scholars, but envisioned for use by diplomats, travelers, and...

, 1668). Those were systems of hierarchical classification that were intended to result in both spoken and written expression. In 1855, English writer George Edmonds
George Edmonds (lawyer)
George Edmonds was an English teacher, lawyer, and scholar. He is principally remembered for his book A Universal Alphabet, Grammar, and Language, which enlarges upon John Wilkins' earlier An Essay towards a Real Character and a Philosophical Language...

 modified Wilkins' system, leaving its taxonomy intact, but changing the grammar, orthography and pronunciation of the language in an effort to make it easier to speak and to read.

Gottfried Leibniz
Gottfried Leibniz
Gottfried Wilhelm Leibniz was a German philosopher and mathematician. He wrote in different languages, primarily in Latin , French and German ....

 created lingua generalis in 1678, aiming to create a lexicon of characters upon which the user might perform calculations that would yield true propositions automatically; as a side effect he developed binary calculus.

These projects aimed not only to reduce or model grammar, but also to arrange all human knowledge into "characters" or hierarchies. This idea ultimately led to the Encyclopédie
Encyclopédie
Encyclopédie, ou dictionnaire raisonné des sciences, des arts et des métiers was a general encyclopedia published in France between 1751 and 1772, with later supplements, revised editions, and translations. It was edited by Denis Diderot and Jean le Rond d'Alembert...

, in the Age of Enlightenment
Age of Enlightenment
The Age of Enlightenment was an elite cultural movement of intellectuals in 18th century Europe that sought to mobilize the power of reason in order to reform society and advance knowledge. It promoted intellectual interchange and opposed intolerance and abuses in church and state...

. Leibniz and the encyclopedists realized that it is impossible to organize human knowledge unequivocally as a tree, and so impossible to construct an a priori language based on such a classification of concepts. Under the entry Charactère, D'Alembert
Jean le Rond d'Alembert
Jean-Baptiste le Rond d'Alembert was a French mathematician, mechanician, physicist, philosopher, and music theorist. He was also co-editor with Denis Diderot of the Encyclopédie...

 critically reviewed the projects of philosophical languages of the preceding century.

After the Encyclopédie, projects for a priori languages moved more and more to the fringe. Individual authors, typically unaware of the history of the idea, continued to propose taxonomic philosophical languages until the early 20th century (for example, Ro). More recent philosophical languages have usually moved away from taxonomic schemata, such as 21st century Ithkuil
Ithkuil
Ithkuil is a constructed language marked by outstanding grammatical complexity, expressed with a rich phonemic inventory or through an original, graphically structured, system of writing....

 by John Quijada.

See also

  • Engineered language
    Engineered language
    Engineered languages are constructed languages devised to test or prove some hypotheses about how languages work or might work. There are at least three subcategories, philosophical languages , logical languages , and experimental languages...

  • Natural semantic metalanguage
    Natural semantic metalanguage
    The Natural semantic metalanguage is a linguistic theory and a practical, meaning-based approach to linguistic analysis. The theory is based on the conception of Polish professor Andrzej Bogusławski...

  • Mirad
    Mirad
    Mirad is an artificially-constructed auxiliary language developed and published by Paris-based author Noubar Agopoff as a serious medium for easy and logical international communication. Mirad is categorized by constructed language aficionados as philosophical because its vocabulary is mapped...

    Mirad (aka Unilingua) is a philosophical language
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