Referentias por la percentage de la ressources:
- 100% por Esperanto.
- 50% por Ido.
- 10% por lingua satis complete por parlar lo.
A[]
- AbAcadon (Moser) 2010 0%
- Ablemonde (G. Schwartz) 1932 0%
- Acadon (Moser) 1988 0%
- Adamitik (A. Velics) 1909 0%
- Adam-man Tongue (E. Shaftesbury) 1903 10%
- Adelfeal Lingw (A. Kovalyev) 1912 1%
- Adjuvanto (L. de Beaufront) 1890 1%
- Adjuvilo (C. Colas) 1908-1910 9%
- ADLI (A. Piras) 1984 0%
- Aercant (Bush) 2002
- Afga (W. Rosenberger) 1897 0%
- Afrihili (K.A.K. Attobrah) 1973 3%
- Alevato (S.P. Andrews) 1871 0%
- Algilez (Alan Giles) ~1999 10%
- Aligrams (A. Fiumedoro) 1969 0%
- Aliq (R.P.G. Vallaeys) 1930 0%
- Allmiror (A. Lougovoï) 1895 0%
- Allteutonic / Allteutonish (E. Molée) 1915 0%
- Almondo (J. H. Ephron) 1931 1%
- Allteutonish / Altutonish (E. Molée) 1911 0%
- Altayko (M. Sondhal) 1913 0%
- Alto-Greek (Hatfield) 2004
- Altuta (C. Ternest) 1951 0%
- Alwato (S.P. Andrews) 1877 5%
- Americai Speak (R.O. Foulk) 1937 2%
- American (C.L. O'Connor) 1917 8%
- American Cosmo (M. Arnold) 1935 0%
- American Language / Germanic English (E. Molée) 1888 0%
- Amerilang 2020
- Amerysk (Filssunu) 1979
- Amiana (P.E. Stojan) Kraguyevats, 1919-1922 0%
- Ande (A. W. Anderson) 1960
- Anglic (R.E. Zachrisson) 1930
- Anglido (Raymond) Kalamazoo, Michigan, U.S.A. 1927
- Anglo-franca (P. Hoinix / G.J. Henderson) 1889
- Anglo-german
- Anglo-Lat (R. Montero) 1967
- Anglo-latine
- Angos (Ben Wood) 2011 25%
- Anjelika (A. Halliner) 1929
- Antelangua
- Anti-Babilona (H. Magli) 1955
- Antido, I & II (R. de Saussure) 1924
- Anti-Volapük / Mezzofanti-sprache (F. Mill) 1893
- Ao (B. Gordin) 1920
- Ao Reformed (B. Gordin)
- Apolema / Langue Pacifiste (de la Grasserie) 1907
- Arcaicam esperantom (Kalocsay & Halvelik) 1969
- Ardano (Zeinelabidin Elhassi) 2008
- Ardibasa 2019
- Àrdu (Ruje) 2019
- Areidansk (C. Lupini) 1988
- Ariadna / Arling / Esperido de Shmurlo (Shmurlo) 1920
- Ariana / Aryana (Stojan) St. Petersburg 1912
- ARIEL
- Arlipo (Vitek) 2003
- Ars signorum / Universal character and Philosophical Language (Dalgarno) 1661
- Arulo / Gloro (Talmey) 1924
- Aryana / Ariana (Stojan) St. Petersburg 1914
- Aspiranto 1924
- Astegonagraphianek
- Atlango (Antonius) 2002 20%
- Atlas (Díaz) 2017
- aUI (Weilgart) 1973
- Auli (de Wahl) 1909
- Auxil (de Belje) Belgica 1957
- Auxilia (Morin) 1947
- Auxiliar English (O. Ferguson) 1929
- Auxilingua (Bowks) 1979
- Avant-projet (Effel) 1968
- Ayola / Aiola (R. Stimets) 1995
B[]
- Babm (Okamoto) 1962
- Bahasan (Moser) 1989
- Balaibalan (Mohyieddin) 1500s
- Balta (Dormoy) Francia 1887-1893
- Banana (Aukland)
- Basic
- Basic English (Ogden) 1932
- Baza / Inter-esperanto (Hoover) 2003
- Berendt (Berendt) 1977
- Bishling
- Bitruscan (Bowks) 1979
- Blaia Zimodal / Blaia zimondel (Meriggi) Italia 1884
- Blissymbolics / Semantography (Bliss) 1949
- Blondel / Langue de Blondel (Blondel) 1910s
- Bolak / Langue Bleue / Lingua Blau (Bollack; from France) 1899
- Bon Wen 2009
- Bonjang (Medrano) 2003
- Bopal (St. de Max) 1887*
- Bumlan (Lucas) 2020 15%
C[]
- Cacone (Sack) 1960
- Carporophilus , Leipzig, Germania 1734
- Casuela (Voirol) Paris, Francia 1922 e Turino, Italia 1927
- Católica / Langue Catholique (Liptay) 1890
- Celtiecc
- Central Dialekt / West-Europisch (Nilson) Svedia, 1896
- Centralia
- Ceqli (Rex F. May) 19xx
- Chabé-Abane / Langue Naturelle (Maldant) Paris, Francia 1887
- Characteristica universalis
- Choton (Kramm) Nord-Rhine Westphalia, Germania 2004
- City-language (Emami) 1959
- Clarison (Henderson) 1899
- Colonial English
- Common (na Xafen)
- Common Germanic (Johnson) 2002
- Common Writing / Universall (Lodowick) 1647, 1952
- Communia / Myrana (Stempfl) 1894
- Communicationssprache (Schipfer; from Germany) Wiesbaden, Germania 1839
- Completo 1952
- Compromiss-Sprache
- Comunleng 2000
- Concorde / Concordu (Flaherty-Hall) 1952
- Corintic (A. Miller) 1908
- Cosman (Milner) 1927
- Cosmian / Qôsmianî (Beatty) 1928
- Cosmo-English / Cosmos English / World-English (Hamilton) 1911-1939
- Cosmoglossa / Pantos-dimou-glossa / Cosmo-glotta (de Rudelle) 1858, 1959
- Cosmolingvia (Horowicz) Cracovia, Polonia 1927
- Cosmopolita Lingvo (de Saussure) Francia 1913
D[]
- Dalid (Bowks) 1998
- Dan'a'yo (単亜語)
- Dastmen (Juan M. Jiménez Noguera) 1984
- Decimal language (Delormel) Francia 1795
- Dejeru Sapuho / Desa Chat (Davis) 1989
- Delmondo
- Dey Daynd (Guerrero) Barcelona, Espania 1898
- Dialekt Centralia (Nilson) Svedia 1899
- Dil (Fieweger) Breslau, Germania 1893
- Dilpok (Marchand) Francia 1898
- Doko language, 2020
- Dolmetscher-Sprache
- Domni (Bond) 1913
- Dousha (Digi-Alchemist) 2002
- Dunia (Ed Robertson) 1996
- Dunish (Risto Kupsala) 2020 8%
- Dutalingue (Duthil) 1908
- Dynamic (Molée) Chicago, USA 1921
E[]
- E2 (Sindelka) 2003
- Earthish (Metaglossa Philosophica), 2021
- Easy-lang 2012
- Edilo (Haugg) Munich, Germania 1909
- Edmond's apriori language (Edmonds) 1856
- Ehmay ghee chah / USL / Universal Second Language (Hankes) 1992
- Eklekta (Jespersen) 1907
- Ekselsioro (Greenwood) London, Britannia 1906
- Ekspreso (Bowks) 1996
- Elefanto (Patrick Chevin) Brasil, 2011
- Elpilingue
- English / Standard English as a Global Language
- Englo 2016
- ENI (M. Monnerot-Dumaine) 1963
- Eo (Stojan) Geneva, Svissa 1926
- Erling
- Esata (Pafu) 2004
- Esk (Sendahl) 1912-1913
- Esp
- Espéisme
- Esperando (Bowks) 2000
- Esperanta 1924
- Esperantida (de Saussure) Neufchatel, Francia 1919
- Esperantido / Lingvo Esperantida (de Saussure) 1910, 1913, 1919
- Esperanto (Zamenhof; from Poland) 1887 100%
- Esperanto II (de Saussure; from Switzerland) Berne, Switza 1937
- Esperanto de Antido (de Saussure) 1910
- Esperanto moderna 1958
- Esperanto reformita / Esperanto Reformed / Reform Esperanto (Zamenhof) 1894
- Esperanto sen Chapeloj (Couturat) 1906
- Esperanto sen Fleksio (Richard K. Harrison)
- Esperanto simpligitaj 1925
- Esperantuisho (Zelezny) Checoslovachia 1951
- Esperido (Raymond) 1925, 1927
- Esperilo 1930
- Espido (Pesch) Francia 1923
- Espo (Stojan) Geneva, Svissa 1926
- Espro 1963
- Etem (Yushmanov) 1928
- Etwu 1997
- Eulalia (Skrabek) 1908
- Eulingu
- Euphony
- Eurana (Dieckmann)
- Euransi (Sztemon) Czech Republic
- Eurial (Jonsson) 1990
- Eurikido (Madonna)
- Euriko (Madonna)
- Euro-Glosa / Glosa (Ashby & Clark; from Great Britain) 1981
- Euroglot (Ahlstrôm) Svedia 1957
- Eurolang (Hunt) 1995
- Eurolang 2017
- Eurolengo (Jones) 1972
- Eurolingue (Ortega) 2005
- Eurolingvo / Anglo-Interlingvo (Summers) 1998
- Euronord (Pilgrim) 1965
- Europa 2019
- Europa Languo (Yuuki Abe) 2001
- Europa Latine (Visser) Amsterdam, Nederlandia 1948
- Europal (Weisbart) Hamburg, Germania 1910, 1912
- Europan (Diehl) 1998
- Europanto (Marani) 1996
- Europé
- European (Jago) 1955
- European (Foddik) Utrecht, Nederlandia 1931
- European 2019
- Europeano (Bowks) 2000
- Europeo (Bravo del Barrio) Madrid, Espania 1914
- EuroPidgin
- Eurotongue 2019
- Euscara (Josu Lavin) Vasconia (=Pais Basc)15 Novembre 2006
- Evoluto (Bond)
- Evroptal (Le Masson) Yerres, Francia 199?
- Experimental Ido 1967
- Expreso
- Extra lingua (Miller) 1918
- Eezee (Moyer) 2009
F[]
- Farlingo (Farber & Farber) 2001
- Fasile / Fasile21 (Breitenbach) 1974, 2001, 2012 20%
- Federal
- Fitusa
- Folkspraak (Courson) 2001
- Fonetiko litera 1904
- Fortschritt (Marold) Berlin, Germania 1949
- Franka
- Fransezein
- Frater (Pham Xuan Thai) 1957
- Frater2 (Bartlett) 1997
- Fraternitat (Monaco) 1912
- Frendo (Churruca) 1966
G[]
- Gati / Lingua de Gati (Gati) Budapest, Hungaria 1820
- Gavlensografie / Gavlensolalie (von Gablenz) Leipzip, Polonia 1856-1860
- Gerber / Lingua de Gerber (Gerber) 1832
- Gerher / Lingua de Gerher (GerHer) 1790-1832
- Genigrafia
- Geo
- Geoglot (Donoghue) 1916
- Geographische Sprache
- German-English (Molée) Chicago, USA 1888
- Gestuno (World Deaf Congress) 1951, 1973
- Glan-ik (Ware) 1906
- Glix (Young) Boston, USA
- Globaqo / Globago (Russell) 1956
- Globasa (Ortega) 2019
- Globien / Klovien
- Gloro / Arulo (Talmey) 1924
- Glosa / Euro-Glosa (Ashby & Clark) 1981 [1]
- Glot / Glott
- Grammatica lingue universalis missionum et commerciorum (Labbé) 16??
- Guidareca (Cheshikhin) 1924
- Guosa (Igbineweka) 196?
H[]
- Halblatein
- Harmonie Universelle (Mersenne) 1636
- Héli's First Project (Hély) Langres, Francia 1905
- Hémi-pasigraphie
- Hesperyo
- Hipersigno
- Hochek / Lingua de Hochek (Hochek) Kromeriz, Tchek 1908
- Homapar (el Gyor) Hungaria 1913
- Hom-Idiomo / Hom Idyomo (Cardenas) 1921, 1924
- Hoy-Koy (Ottander) Svedia 1946, 1947
I[]
- Iala
- IALA (International Auxiliary Language Association) 1951
- Ialo (Jolin) Doylestown, 1938
- Iberico 2020
- Idéographie
- Idéographie lunaire
- Idido
- Idiom Neutral (Rosenberger) St. Petersburg, Russia 1902-1903
- Idiom Neutral Modifiket (Meysmans) 1909
- Idiom Neutral Reformed (Pinth) 1912
- Idiom Neutral Reformed (Rosenberger & von Wahl) 1907
- Idioma internacional (de la Cruz) Mexico 1945
- Idiome federal / Langue fédérale (Barral) Nice, Francia 1923
- Ido (Couturat & de Beaufront; from France) 1907 [2] [3]
- I.D.O. 1928
- Ido avancit (Harding) London, Britannia 1925
- Ido reformate 1966
- Ido novialisat 1928
- Ido Novializat / Ido reformita/ Ido Simpligata (Meazzini) 1928
- Ido reformita (R.G. Kent) 1928
- Ido reformita (Tankerton) 1928
- Idoro
- Ikuso / tinico / tino / fasilinguo / fasilinguico (Alexandre Xavier Casanova Domingo) 2001-2003
- Ile / Ispirantu (Seidel) 1909
- Ilomi (Sulky) 2005
- Indio / Indeo (Indeo) 2020 15%
- Intal (Weferling; from Germany) 1956
- Intal II (Weferling) 1964
- Interal
- Interceltic
- Inter-esperanto / Baza (Hoover) 2003
- Interglossa (Hogben) 1943
- Interlatino
- Interling / Interling Sistem (Wood) 1959
- Interlingu (Wood) 1929
- Interlingua (International Auxiliary Language Association) 1951 [4]
- Interlingua Intercontinental (Gode) 1950's
- Interlingua reformate de Fritzsche (Fritzsche)
- Interlingua Romanica Vide: Romanica
- Interlingua de Peano -> Latino sine Flexione
- Interlingua romanisate de Podmele (Podmele)
- Interlingua de Stark / Latino Moderne (Stark) 1996
- Interlingue de Lavagnini (Aldo Lavagnini) 1923
- Interlingue / Italico
- Interlingue -> Occidental
- Internacional
- Internasional
- International 1887
- Internationish 2019
- Intero 2004
- Interocidental
- Interpres / Interprète international
- Interprète universel
- InterRoman (Patrick Chevin) Brasil, 2010
- Intersistemal (Mitrovitch) 1947
- Interslav 2019
- Interslavic
- Intralingua
- Invipudmun 2017
- Is -- Interlingua Sistematic (Rossello-Ordines) 1922
- Isotype
- Ispirantu / Ile (Seidel) 1908, 1909
- Italico / Triola 1905-1909
J[]
K[]
- Kah 2006
- Kanu Sala 2020
- Kemo Lasa (Patrick Chevin) Brasil, 2010
- Kentung / Monling
- KiBantu
- Kokographie
- Konkordia / Konkordio (René de Saussure?) 1911?
- Konkordo (René de Saussure?) 1911
- Konya (Sulky) 2005
- Kosmal Idioma / Orba (José Guardiola) 1893
- Kosmo
- Kosmolingua
- Kosmos (Lauda) Germania 1844
- Kotava (Staren Fetcey) 1978
- Koten-1 (Rand) 2018
- Kweda
L[]
- Lalortel (N. R. Yetter) 1959
- Langage humain
- Langage instantané
- Langage simplifié
- Langage Humain (Umano) 1900
- Lango (Robert Craig & Antony Alexander) 1996
- Lango du Mondo (de Ria) 1788
- Langue Bleue / Lingua Blau / Bolak (Leon Bollack) 1899
- Langue Catholique / Catolica
- Langue étymologique
- Langue extra-nationale
- Langue facile
- Langue fédérale / Idiome federal
- Langue internationale
- Langue internationale étymologique (Reimann) 1877
- Langue internationale néo-latine
- Langue musicale
- Langue naturelle / Chabé-Abane (Maldant) 1887
- Langue nouvelle (Faiguet)
- Langue Pacifiste / Apolema
- Langue paneuropéenne
- Langue simplifiée
- Langue sacrée
- Langue Universelle (Delormel) 1795
- Langue universelle (Menet) 1886
- Langue universelle de l'humanité
- Langue universelle et analytique (Vidal) 1844
- Langue universelle symbolique
- Langugu 2017
- Languo auxiliara
- Languo Comono
- Lankusa 2020
- Lanopiküro
- Lara (A. Pedicelli) 1991
- Lasonebr (Nilson) 1897
- Lateinischen (Volk / Fuchs) 1883
- Latin simplifiée
- Latineo (Jay Bowks) 2000
- Latinesce (George J. Henderson) 1890-1901
- Latinesco (Macmillan) 1930
- Latin-esperanto 1911
- Latini
- Latin-ido 1911
- Latinised English (George J. Henderson) 1901
- Latino Commerciale
- Latino hodierno
- Latino internationale
- Latino macaronico (Teofilo Folengo, Tisi degli Odassi) 1500s
- Latino moderne (INTERLAND) 2001
- Latino Moderne (David Stark) 1996
- Latino sine Flexione / Interlingua (Giuseppe Peano; from Italy) 1903, 1927
- Latino universale / [[Universal Latein
- Latino Viventi (Fibula) 1925
- Latinoid (W. C. R.) 1904
- Latinulus (Vito Martellotta) 1919
- Latinvlo (Paul O. Bartlett) 199?
- Latuna
- Lenga Romance (Danilo Vilicic Alarcón) 1994
- Lengua Catolica
- Lengua Universal (P.L.Martinez) 1852
- Lengua universal y filosófica / Langue universelle (Bonifacio Sotos Ochando) 1852-1855
- Letellier / Langue universelle de Letellier (C. Letellier) 1855-1861
- Liana
- Liberanto (Kotar) 1965
- Lincos / Lingua Cosmica (Hans Freudenthal) 1960
- Ling (Anders Olson) Svedia 1943
- Ling du Mond (Consoli) 1925
- Lingu internacional
- Lingu Internasionik (W. Rosenberger) 1895
- Lingu universal
- Lingua (George J. Henderson) 1888
- Lingua catholica
- Lingua de Ria (Ria) 1788
- Lingua European (Bonto van Bijlevelt) 1898
- Lingua filosofica pei dotti
- Lingua filosofico universale
- Lingua Franca Nova (C. George Boeree; from the USA/the Netherlands) 1995 [5] [6]
- Lingua Franca Nuova (Bernhard) 1888
- Lingua Franca of the Levant (Mediterranean Coastline) Middle Ages to 19th Cent.
- Lingua Franka
- Lingua geral brazilica (Jesuits, Brazil) 1500s
- Lingua Internacional (Zakrzewski) 1905
- Lingua Internazional (Lott)
- Lingua italiana infinitiva
- Lingua Komun (F. Kurschner) 1900
- Lingua Latina (Classic)
- Lingua Ludovicea (J. Frisch) 1681
- Lingualumina / Lingua lucida (Frederick William Dyer) 1875
- Lingua Mundi
- Lingua Philosophica
- Lingua Progressiva (der Schatten)
- Lingua rationalis
- Lingua Románica (Eusebes) 1994
- Lingua Slavica Universalis (J. Herkel) 1826
- Lingua universalis
- Lingue international
- Lingue Simple (Patrick Chevin) 2013
- Linguo internationala
- Linguo romane universale
- Lingus european 1907
- Linguum Islianum / Langue Isly (Isly) 1901
- Lingva Xronari (Libor Sztemon)
- Lingvo Cosmopolita (René de Saussure) 1913
- Lingvo Internatsia de Antido (René de Saussure) 1912
- Lingvo komona 1923
- Lingvo kosmopolita (René de Saussure) 1912
- Lingvo monde
- Lingw Adelfenzal -> Adelfeal Lingw
- Lingwa de Planeta (Ivanov, Lysenko, Ivanova, Vinogradova; from Russia) 2010 [7] [8]
- Lingwo Internaciona (René de Saussure) 1907
- Lips Kith (Joseph Scarisbrick) 1919
- Liwi 2019
- Loga (Nield) 1926
- Loglan (James Cooke Brown) 1955
- Logo
- Logopandecteison (Thomas Urquhart) 1651, 1653
- Lojban (Logical Language Group) 1987
- Luftlandana
- Lugar
- Lusane (Luis Sainz Lopez-Negrete) 1988
M[]
- Magistri / Master language (Stephen Chase Houghton) 1907, 1929
- Malfasito
- Mandab
- Mapalgetian Continental Basic Language (Johnston) 2003
- Meazzinido
- Medial / Medial europan (Josef Weisbart) 1925
- Median
- Medilingua (James Chandler) 2005
- Medio
- Meiko (Gabriel Svoboda) 2016
- Mela
- Menimo / Mundolingua
- Meo
- Mergan (Jay Bowks) 2000
- Meso (Bond) 1926
- Méthode rapide
- Mezhdunarodny Nauchny Yazyk (International scholar language) -> Adelfeal Lingw
- Mez-voio (Jamin) 1908
- Mezzofanti-ling
- Mezzofanti-Sprache / Anti-Volapük
- Mini 2020
- Minima
- Miografia
- Mittelmachte Esperanto 1916
- Mondea
- Moderna Esperanto / Modern Esperanto
- Molog 1911
- Monario (Aldo Lavagnini) 1925, 1929
- Monda
- Monda Linguo
- Mondal
- Monde
- Mondea
- Modern Esperanto / Moderna Esperanto 1958
- Mondezo
- Mondi
- Mondial (Helge Heimer; from Sweden) 1957
- Mondialo / Nov-Esperanto / Nuv-Esperanto
- Mondik
- Mondi Lingua (Aldo Lavagnini) 1939
- Mondi-Lingue / Mondil
- Mondilange 2009
- Mondlango (He Yafu; from China) 2002 [9]
- Mondlingu
- Mondlinguo / Mondilingwo (Aldo Lavagnini) 1936
- Mondlingvo (Trischen) 1906
- Mondlingvo (Josef Weisbart) 1927
- Mondilingwo II
- Mondo
- Mondolingue 1888
- Monling / Kentung
- Monoglottica
- Monopanglosse
- Mul: Monosyllabic Universal Language
- Munbab / Munglib
- Mundelingua (J. von Hummler) 1904
- Mundelingua (Julius Lott) 1917
- Mundelingva
- Mundeze (Djuna de Lannoy; from Belgium) 2012
- Mundi Latin (Josef Weisbart) 1930
- Mundial
- Mundion (H. Weinreich) 1951
- Mundolinco (J. Braakmann; from the Netherlands) 1888
- Mundolingua / Menimo
- Mundolingue (Julius Lott) 1889, 1890
- Mundolinguo
- Myezhduslavyansky Yezyk
- Myrana / Communia (J. Stempfl) 1894
N[]
- Nal Bino
- Nalone 2003
- Nao 2013
- Naobè 2009
- Natural
- Natural Language
- Natural Mother Tongue
- Natural Universal Language
- Neo (Alfandari; from Belgium/Italy) 1961
- Neo-Esperanto 1964
- Neoíspano 1973
- Neo-Latin / Neo-latine (Courtonne) 1875, 1885
- Neo-latino (Lundström) 1928
- Neolatino (Schild)
- Neo Patwa (Jens Wilkinson) 2005
- Neoromano I (Slonimski) 1924
- Neoromano II (Slonimski) 1926
- Neosinografia
- Nepo / Neposlava (Cheshikhin) 1907-15*
- Neue Latin
- Neuslavischen Sprache (Hosek) 1907
- Neu-Esperanto 1912
- Neutral
- Neutral Reformed
- New Chino-Japanese
- New Perfect Language (Francis Lodowyck) 1652
- Niu Tutonish 1906
- NL1 (Alex C.) 2000
- Noématopasigraphilalie
- Nordlinn
- Normlingva Esperanto 1966
- North American (Grevor) 1966
- Nouvelle Langue
- Nova Latina
- Nova Latine
- Nova Lingua Catholica et Erudita (Adam Adamandy Kochański) 1680
- Novam (Touflet) 1928
- Novbasa (Ansaloni) 2013
- Nove auxilia
- Nove-latina (Diemen) 1921
- Nov Esperanto / Nuv-Esperanto / Idiomo Mondialo (De Saussure) 1925, 1928, 1932
- Novial (Jespersen; from Denmark) 1928-37
- Nov-Ido 1937
- Novilatin (Pigal)
- Novilatiin (Beerman) Germania 1885, 1895
- Novilatin (Beerman) Germania 1907
- Novilo 2017 10%
- Novi Latine 1911
- Nov-Latin (Rosa) 1890
- Nov Latin Logui (Pompiati) 1918
- Novo Romane
- Novum (Moszczynski) 1994
- NOXILO (Sentaro) 1997 [10]
- Numerlingue / Zahlensprache
- Nuove-Roman (Puchner) 1897
- Nuv-Esperanto / Nov-Esperanto / Mondialo 1910, 1925
- Nuvo-Volapük (Kerckhoffs) 1887
- Nyrþik 2019
O[]
- Obshcheslavyansky Yazyk (C. Djurdjević) 1940
- Obshchyechyelovyeskiy Jezik (K. Tsiolkovskiy) 1927
- Occidental / Interlingue (Edgar de Wahl) 1922
- Ofat
- Oïdapa
- Oiropa'pitschn (Adalbert Baumann) 1928
- Okeslan 2015
- Olingo (R. Stewart Jaque) 1944
- Om
- Omnez (Bond) 1912
- Omnial (Ojala) 2002 20%
- Omo (V. I. Vengerov) 1926
- Optez (Bond) 1916
- Optoez (Bond) 1921
- Orba / Kosmal Idioma (José Guardiola) 1893
- Orbidaïe
- Oregon Trade Language
- Ortologia Esperanto
- Ortografia Colateral de Interlingua (IALA) 1951
- Oz
P[]
- Pacez (Yosio Obana) 1983
- Paleneo (Leslie Charteris) 1972
- Pan-Arisch (P. L. Friedmann) 1908
- Panamane (Manuel E. Amador) 1936
- Panamericano
- Pandunia (Risto Kupsala) 2007
- Panedo
- Pangermanic
- Panglossie
- Panglottia
- Panglottie (J. Komensky) 1666
- Pangraphie (Burmann) 1805
- Panhomel
- Pan-Kel (Max Wald) 1906
- Panlingua (Harve) 1938
- Panroman / Unial / Universal Ling (Henrik Molenaar) 1903
- Panskrit 1925
- Paqatyl (Olfaa) 2007
- Pario
- Parla (Spitzer) 1907
- Parlamento
- Parlo (C. Reitmann) 1894
- Pasigraphion
- Pasilalie de Burja (Abel Burja) Berlin, Germania 1808
- Pasilalion und pasigraphion (Mojsije Paic) Paris, Francia 1864
- Pasilingua (Steiner) 1885
- Pasilingua hebraica
- Pasilogia (Edward Groves) 1846
- Pasilogie
- Pasiologie (de Visme) 1806
- Pasitélégraphie
- Pasographie
- Patoiglob (P. B. Bohin) 1898
- Patoloiglob / Syllabaire Moderne Universelle
- Peace Language
- Perfect 1910
- Perfekt
- Perfektigo de Esperanto 1910
- Perfektlingvo / Perfektsprache (Alois Hartl) 1909
- Perio (Mannus Talundberg) 1904
- Philosophical language
- Phonarithmon
- Phonetic
- Picto (Janson) 1957
- Pikto
- Plibonigita Esperanto 1926
- Pluranto (Cyber-Planet SOFTEX Ltd.) 1997
- Poliespo
- Polygraphia (Athanasius Kircher) 1633
- Polygraphie (Z. Hourwitz) 1801
- Popido (M. Halvelik) 1973
- Populido 2010
- Progres
- Progressiva (M. Suardi) 2003
- Promyetye-Prosvyetityel
- Proyo (braien) 2019
Q[]
- Qôsmianî / Qosmiani / Cosmian (Wilbur M. L. Beatty) 1928
- Quebh 2004
- Quji / QJ koo-jee
R[]
- Radioglot (Wikel) 1956
- Rapidlingue 2011
- Real Character and Philosophical Language (John Wilkins) 1668
- Reform (Wood) 1949
- Reform Esperanto 1967
- Reformed Esperanto (Roy McCoy) 199?
- Reform-Espranto 1910
- Reform Esperanto (P.D. Hugon) 1910
- Reform Esperanto (P. Rodet) 1910
- Reformido 19??
- Reformita Esperanto de Antido (René de Saussure) 1917
- Reform Latin / Reformlatein 1902
- Reform Neutral (W. Rosenberger & E. de Wahl) 1907-1912
- Reformed Volapük / Volapük Revised
- Regular English / Nugotic (Elias Molée) Chicago, USA 1893
- Regular Russian
- Relingua
- Renova
- Ro (Edward Powell Foster) 1908
- Romana (Dan Tohatan|D. Tohatan) 2003
- Romanal (Alfred Michaux) 1909, 1912
- Romanés
- Romangle
- Romanica (Josu Lavin) Vasconia (=Pais Basc)15 Maio 2001
- Romanid (Zóltan Magyar) 1958
- Romani universale
- Romanizat (R. Brandt) 1908
- Romano (Slonimski) 1910
- Romanova (David Crandall) 2000
- Rosentalographia
- Ruly English
S[]
- Sabir (P. Moralda) 1932
- Safo / Die neue Weltschrift (Andreas Eckardt) 1962
- Salvador (Francisco Gavidia) San Salvador, El Salvador 1909
- Samaya 2013
- Sambahsa-mundialect (Olivier Simon; from France) 2007
- SASXSEK (Dana Nutter) 2003
- Scriptura oecumenica
- Semilatin / Semilatino
- Sehlerai
- Semantography / Blissymbolics (Charles Kasiel Bliss) 1949
- Semi-latin 1910
- Sen:espera (Jeffrey Henning)
- Senzar
- Sermo
- Sermo (Jose Soares da Silva) 2003
- Servasprache / Serve (Kuntovsky) 1928
- Seytil (Rosto) since 2011 15%
- Sibelingua 2010
- Silarg (Mallaroni) 2004
- Simi orbis 2018
- Simingsound (E. B. Johnston) 1960
- Simpenga (Henning) 1996
- Simpla (Fredrickson) 2002
- Simplat
- Simpleslavic 2016
- Simplingua
- Simplified English (Follick) 1934
- Simplingue 2018
- Simplo (Mario Ferranti) 1911
- Sintesal
- Sintezo (Jacques Dehée) 2006
- Sistemizd English -> Aligrams
- Slava Esperanto / Slavina / Slavina Slawsky (Josef Konechný) 1912
- Slovans^tina
- Slovenski
- Slovianski (Ondrej Rečnik, Gabriela Svoboda, Jan van Steenbergen, Igor Polyakov) 2006 [11]
- Slovio (M. Hucko) 1999 [12]
- Solresol (Jean François Sudre) 1817
- Soma
- Sona (Kenneth Searight) 1935
- Soundwriting (Bivins) 1960
- Special English (United States Information Agency) 1959
- Spécieuse générale
- Speedwords / World Speedwords (R. J. G. Dutton) 1923
- Spelin (Georg Bauer) 1888
- Spet 2003
- Spiki 2015
- Spiranta 1911
- SPL / simplified Latin (Richardius Dominicus) 1982
- Spokil (Adolphe Nicolas; from France) 1890
- Stipfone
- Stoechiophonie
- Suma (Barnett Russell) USA 1957
- Süümäri 2007
- Syllabaire Moderne Universelle / Patoiglob
- Synthetic English
T[]
- Takad
- Tal (A. Hoessrich) 1903
- Tavo
- Teedish 2018
- Telekaba (C. von Pirquet) 1913
- Telluro
- Terlïn 2017
- Terminologieschlüßel
- Tersboca (M. Rotter) 1912
- Terwene (Lucas) 2017 15%
- Texperanto (R. May)
- Timerio
- Toito Spike (E. Molée) Chicago, USA 1923
- Toki Ma 2020
- Toki Pona (S.E. Kisa) 2001
- Torskript (V.P. Paulsen) 1963
- Townish 2012
- Translingua (1956)
- Translingua (2020) [13]
- Transpiranto (M. Weichert) 1997
- Trilingvo
- Triola / Italico 1905
- Tunipasa (Henri S-L) 2020
- Tutonish / Anglogerman Union Tongue (E. Molée) Chicago, USA 1901, 1902
U[]
- Ulla (Frederick Greenwood) 1906
- Ultimate language
- Umin (Sonja Lang) 2017 1%
- Una 1926
- Unesal Interlingu (Weferling) 1923
- Uni (Elisabeth Wainscott) 1975
- Unial / Panroman / Universal
- Uniala (Troost) 1923
- Unifianti [14] [15]
- Unified (A. Lallemand) 1964
- Unilingua 1964
- Unilingue (Aldo Lavagnini) 1924
- Unilo 1961
- Unione
- Union sistem / Langue Fédérale (Barral) 1914
- Unipix (Cindy Drolet) 1982
- Unish (Language Research Institute; from South Korea) 2000
- Uni-Spik (P. de Biran) 1950
- Unita (Stojan) 1923
- Unitario (Mario Pleyer) 1987
- Uniti Langue 1923
- Universal (Zviazku Radzeckim) 1925
- Universal / Panroman (Henrik Molenaar) 1906
- Universala (Eugen Heintzeler) Stuttgart, Germania 1893
- Universal character and Philosophical Language / Ars signorum (George Dalgarno) 1661
- Universal character of Beck (Cave Beck) Britannia 1657
- Universal Eo (René de Saussure) 1912
- Universal-Esperanto 1935
- Universal Glot / Universalglot (Jean Pirro; from France) 1868
- Universal Glot de Schipfer (J. Schipfer) Leipzig 1839
- Universal-Latein / Neu-latein (E. Frandsen) 1902
- Universall or Common Writing (Francis Lodowick) 1647, 1652
- Universal-Sprache
- Universalspraket (K.G.F.Kejhser) Stockholm 1918
- Universel (Decormis) 1948, 1957
- Unolok (Hector Wilshire) Australia 1957
- Uralica 2019
- Uropa (Wordsworth Donisthorpe) Guildford, UK 1913
- Uropi (Joël Landais; from France) 199? [16] [17]
V[]
- Veltparl (Wilhelm von Arnim) 1896
- Veltpitschn (Adalbert Baumann) 1925
- Veltspik (W. Rosenberger) 1895
- Verbesserte Weltsprache Esperanto 1912
- Verbessertes Esperanto 1919
- Verbo Steno (Milles-Puyredon) Bruxelles 1925
- Vest-europish
- Vikto (Bõsz Vilmos) 1981
- Vindiana
- Visona (Alesha Sivartha) Chicago, USA 1887
- Viva (N. Nyesmyeyanov) 1913
- Vling (V. Medrano) 2003
- Voksigid (Bruce R. Gilson, et al.) 199?
- Volapük (J. M. Schleyer; from Germany) 1879-1880
- Volapük Revised (Arie de Jong; from the Netherlands) 1931 [18]
- Voldu (Stadelmann) Texas, USA 1946
- Völkerverkehrssprache (C. Dietrich) 1902
- Vorlin (Rick Harrison)
- Voxling
- Vseslovanski
W[]
- Wede / Welt Deutsch (1915) Adalbert Baumann.
- Welt-italienisch Franca (1891) Bernhard.
- Weltdeutsch
- Weltkurz-sprache (1947_ Burian Eugène. Austria.
- Weltlang / World-English (1910) Braendle.
- Welt'pitschn (1925) Adalbert Baumann.
- Weltsprache (1887) Eichhorn.
- Weltsprache de Schipfer (1839) J. Schipfer. Wiesbaden, Germany.
- Weltsprache (1883) A. Volk & R. Fuchs
- Weltsprache Esperanto (1909)
- Weltverkehrssprache (1932) Erwin Ritter. Geneva, Switzerland.
- West-Europisch / Central Dialekt (1896) A. Nilson. Sweden
- Wit-spell / Universal notation (1641) John Johnson.
- World English / Standard English as a Global Language .
- World English (1888) Alexander Melville Bell
- World English / Weltlang Braendle.
- World English / Cosmo-English (1924) James W. Hamilton.
- World Speedwords (1923) Reginald Dutton.
X[]
Y[]
- Ya-zu / Ya-za Huo (Tsegmedin Bold) 19??
- Ygyde (A. Nowicki & P. Hassel-Zein) 2004
- Yolik (Patrick Chevin) Brasil, 2010 - 2013
Z[]
- Zahlensprache (Ferdinand Hilbe) 1901
- ZANA ZIKA
- Zilengo (Asajiro Oka) 1889 3%
#[]
- 353 (Marcelo Martinelli) 2003
- 2004 (Jacques Dehée) 2003