Solresol |
|
1827 |
François Sudre |
Based on pitch levels sounded with their solfege syllables (a "musical language") although no knowledge of music is required to learn it. |
Communicationssprache |
|
1839 |
Joseph Schipfer |
Based on French. |
Universalglot |
|
1868 |
Jean Pirro |
An early a posteriori language, predating even Volapük. |
Volapük |
vo, vol |
1879–1880 |
Johann Martin Schleyer |
First to generate international interest in IALs. |
Esperanto |
eo, epo |
1887 |
L. L. Zamenhof |
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] |
Spokil |
|
1887 or 1890 |
Adolph Nicolas |
An a priori language by a former Volapük advocate. |
Mundolinco |
|
1888 |
J. Braakman |
The first Esperantido. |
Bolak, "Blue Language" |
|
1899 |
Léon Bollack |
Prospered fairly well in its initial years; now almost forgotten. |
Idiom Neutral |
|
1902 |
Waldemar Rosenberger |
A naturalistic IAL by a former advocate of Volapük. |
Latino sine Flexione |
la-peano |
1903 |
Giuseppe Peano |
"Latin without inflection", it replaced Idiom Neutral in 1908. |
Ro |
|
1904 |
Rev. Edward Powell Foster |
An a priori language using categories of knowledge. |
Ido |
io, ido |
1907 |
A group of reformist Esperanto speakers |
The most successful offspring of Esperanto. |
Adjuvilo |
|
1910 |
Claudius Colas |
An Esperantido some believe was created to cause dissent among Idoists. |
Interlingue |
ie, ile |
1922 |
Edgar de Wahl |
A sophisticated naturalistic IAL, also known as Occidental. |
Novial |
nov |
1928 |
Otto Jespersen |
Another sophisticated naturalistic IAL by a famous Danish linguist. |
Sona |
|
1935 |
Kenneth Searight |
Agglutinative language with universal vocabulary. Its 360 radicals can be combined to form new words. |
Esperanto II |
|
1937 |
René de Saussure |
Last of linguist Saussure's many Esperantidos. |
Mondial |
|
1940s |
Dr. Helge Heimer |
Naturalistic European language. |
Interglossa |
igs |
1943 |
Lancelot Hogben |
It has a strong Greco-Latin vocabulary. |
Blissymbols |
zbl |
1949 |
Charles Bliss |
An ideographic writing system, with its own grammar and syntax. |
Interlingua |
ia, ina |
1951 |
International Auxiliary Language Association |
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. |
Intal |
|
1956 |
Erich Weferling |
An effort to unite the most common systems of constructed languages. |
Lingua sistemfrater |
|
1957 |
Pham Xuan Thai |
Greco-Latin vocabulary with southeast Asian grammar. |
Neo |
neu |
1961 |
Arturo Alfandari |
A very terse Esperantido. |
Babm |
|
1962 |
Rikichi Okamoto |
Notable for using Latin letters as a syllabary. |
Unilingua (now Mirad) |
|
1966 (revised 1967 and 2022) |
Noubar Agopoff |
A priori ontological vocabulary. Every letter has semantic or functional meaning. |
Arcaicam Esperantom |
eo-arkaika |
1969 |
Manuel Halvelik |
'Archaic Esperanto', developed to produce an archaic effect in Esperantoliterature. |
Eurolengo |
|
1972 |
Leslie Jones |
Combines elements of English and Spanish. |
Glosa |
|
1975 |
Ronald Clark and Wendy Ashby |
An evolution of Interglossa. |
Kotava |
avk |
1978 |
Staren Fetcey |
A sophisticated a priori IAL focused on cultural neutrality. |
Uropi |
|
1986 |
Joël Landais |
Based on the common Indo-European roots and the common grammatical points of the IE languages. |
Poliespo |
|
1990s? |
Billy Ray Waldon |
Esperanto grammar with significant Cherokee vocabulary. |
Romániço |
|
1991 |
Anonymous |
Vocabulary is derived from common Romance roots. |
Europanto |
|
1996 |
Diego Marani |
A "linguistic jest" by a European diplomat. |
Unish |
|
1996 |
Language Research Institute, Sejong University |
Vocabulary from fifteen representative languages. |
Lingua Franca Nova |
lfn |
1998 |
C. George Boeree and others |
Romance vocabulary with creole-like grammar. |
Sambahsa-Mundialect |
|
2007 |
Olivier Simon |
Mixture of simplified Proto-Indo-European and other languages. |
Lingwa de planeta |
|
2010 |
Dmitri Ivanov |
Worldlang based on Arabic, Chinese, English, French, German, Hindi, Persian, Portuguese, Russian, and Spanish. |