Table 0. List of international auxiliary languages
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ABCDEFGHIJKL
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NameYearArticlesPhonologyOrthographyVocab sourceToponymsMorphosynthesisAntonymsGenderInflection*Notes
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Classical Latin0 130 000ɡ/ɡʷ, k/kʷ, t~tʃ, n~ŋ, a/aːLatin
Digraphs, cluster letters
Ambiguous spellings
Old Latin, Greek?septe(m)-m(ē)ber, ho(c)-diē, quan-dōSeparate~/ille/illa
hominem/vir/femina
fratrem/frater/soror
V: TAM, number, person
N: number, case
A: number, case, gender
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English10005 970 000d/ð, t/θ, ʒ/dʒ, b/v, w/vLatin
Digraphs, cluster letters, special rules
Ambiguous spellings, ambiguous readings
Old English, Norse, Norman, Latin, FrenchJapan /dʒəpæn/september, to-day, whenSeparatethey*/he/she
person/man/woman
sibling/brother/sister
V: TAM, number
N: number
Singular "they" is not universally accepted.
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Mandarin10001 080 000Too weird to describe succinctlyChineseOld Chinese日本 /ɻ̩˥˩pn̩˧˩˥/九-月, 今-天, 什么-时SeparateTA/他/她*
人/男人/女人
兄弟姐妹/兄弟/姐妹
~All singular third-person pronouns are all identical in pronunciation.
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Solresol1827  0*A priori syllabary or LatinA priori?rere-fa, lare, milalamiReversaldofa/~/~
domifado/~/~
resimire/~/~
~There are seven "phonemes" that map to distinct notes, syllables, and colors
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Volapuk1879 120 000e/ø, y/i, b/v, n~ŋ, s/tsLatin with diacritics
Cluster letters
English, German, FrenchYapän /japæn/setul, a-del, ki-tim-oSeparateon/om/of
men/himen/jimen
~/higem/jigem
V: TAM, (person)
N: number, case
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Esperanto1887 270 000x/h*, ʒ/dʒ, b/v, n~ŋ, w/v*, s/tsLatin with diacriticsLatin, French, English, German, Yiddish, Russian, PolishJapanio /japanio/septembro, hodiaŭ, k-iamAffixesĝi*/hi/ŝi
persono/viro/virino
gefrato*/frato/fratino
V: TAM
N: number, case
A: number, case
/x/ is a marginal phoneme.
/w/ only appears in diphthongs.
Proximate "ĝi" is not well-attested.
Singular "gefrato" is not universally accepted.
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Idiom Neutral1903  0b/v, n~ŋLatin
Digraphs
English, German, FrenchYaponia /japonia/septembr, si-diurn-e, kuandeSeparateil/il/ila
hom/vir/femin
~/fratr/soror
V: TAM
N: number
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Ro1904  0d/ð, t/θ, x/h, b/v, n~ŋ, w/vLatin
Cluster letters*
A priori?tal-rab, til-taf, aw-itClass affixesadh/ad/af
ar/radal/rafal
ragat/radat/rafat
V: TAM
N: number
[ks] is given as an acceptable realization of /x/.
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Ido1907 30 000b/v, n~ŋ, w/v, s/tsLatin
Digraphs, cluster letters, special rules
French, Italian, Spanish, English, German, RussianJaponia /ʒaponia/septembro, ca-die, kandeSeparatelu/il/el
homo/homulo/homino
frato/fratulo/fratino
V: TAM
N: number
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Interlingue1922 5 000z/dz, b/v, n~ŋ, w/v, s/tsLatin with diacritics
Digraphs, special rules
Ambiguous spellings
Romance, Germanic, GreekJapan /ʒapan/septembre, ho-die, quandeSeparateit/il/ella
hom/mann/fémina
~/fratre/sestra
V: TAM
N: number
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Interlingua1951 20 000b/v, n~ŋ, w/v, s/tsLatin
Digraphs, cluster letters, special rules
Ambiguous spellings, ambiguous readings
Italian, Spanish/Portuguese, French, English, German, RussianJapon /ʒapon/septembre, hodie*, quandoSeparate~/ille/illa
homine/viro/femina
~/fratre/soror
V: TAM
N: number, case*
A: (number)
"Die" means "day", but "ho" does not appear to mean anything on its own or in any other compound.
Only pronouns inflect for case.
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Novial1928 2 000b/v, n~ŋLatin
Cluster letters, special rules
English, French, German, ScandinavianJapan /ʒapan/septembre, dis-di, quandSeparatele/lo/la
home/viro/fema
fratre/fratro/fratra
N: number
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Sona1935  0e/ə, b/v, n~ŋLatin
Special rules
A priori*Nihonia /nihonia/September*, in-diri, ke-riSeparate~/on/an
ji/ra/zan
~/bora/bozan
V: TAM
N: (number)
Many of the roots have recognizeable a posteriori origins; Searight acknowledges this.
"Nun-mendi" has been proposed by modern Sonists.
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aUI1950  0a/ã, i~j, e/ø, x/h, y/i, b/v, n~ŋ, w/v, a/aːA prioriA priori?nÛ-êkiA, f-iA, h-ASeparatecu/~/Yvu
us/tonvu/tonLu
jYtu/jYt-vu/jYt-Lu
V: TAM
N: (number)
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Glosa1972  0b/v, n~ŋLatin
Digraphs, cluster letters
Greek, Latin?meno-nona*, nu-di, qo-temSeparatepe/an/fe
persona/andro/femina
sibi/an-sibi/fe-sibi
~"Septembra" is also acceptable, but "meno nona" is explicitly preferred.
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Kotava1978  0b/v, n~ŋ, w/vLatin with diacritics*A priori?lerd-eaksat, bat-vielon, tok-vieleSeparatein/inye/inya
ayik/ayikye/ayikya
berik/berikye/berikya
V: TAM, person, number, polarity, (evidentiality)An acute diacritic is optionally used to inflect verbs for first person singular.
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Uropi1986  0b/v, n~ŋ, w/vLatin plus ⟨3⟩ with diacriticsIndo-EuropeanJaponia /japonia/September, odia*, kanSeparate~/he/ce
human/man/3ina
/frat/sesta
V: TAM
N: number, case*
"Dia" means "day", but "o" does not appear to mean anything on its own or in any other context.
Only pronouns inflect for case.
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Lojban1987 1 000x/h, b/v, n~ŋ, ʔLatin plus ⟨.⟩ and ⟨'⟩Chinese, English, Hindi, Spanish, Russian, Arabicpongu'e /ponɡuhe/soz-mast, cab-dei, ca-maSeparate~/~/~*
rempre*/nanmu/ninmu
tunba*/bruna/mensi
~*Lojban has a special pro-form system where letter names are used in lieu of generic pronouns.
There is also a word, "nunmu", specifically meaning "non-binary person".
There is also a word, "pentu", specifically meaning "non-binary sibling".
It's hard to tell if these inflect, because Lojban doesn't call its verbs "verbs" or its nouns "nouns".
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Romanico1991  0t/θ*, x/h, b/v, n~ŋ, w/v, s/tsLatin with diacritics
Digraphs, cluster letters, special rules
LatinJaponia /dʒaponja/Septembro, ho-die, cuandeSeparate or affixesli/ili/eli
humano/humaniçho/humaniso
germano/germaniçho/germaniso
V: TAM
N: number
[t] is an acceptable realization of /θ/.
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Unish1996  0b/v, w/vLatin
Digraphs, cluster letters, special rules
WorldlangJapan /dʒapan/*ni-mes, to-di, when*Separatele/~/~
person/?/woman
~/bruder/sistor
V: TAM
N: number
The official dictionary claims that the word "Japan" is of Korean, Japanese, and Chinese origin.
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Lingua Franca Nova1998 4 000b/v, w/vLatinFrench, Italian, Portuguese, Spanish, CatalanNion /njon/ or
Japan /ʒapan/
setembre, oji, cuandoSeparateel/~/~
person/om/fem
conaseda/frate/sore
N: number
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Slovio1999  0b/v, n~ŋ, s/tsLatin
Digraphs
Slavic, Balto-SlavicJapon-ia /japonia/Septembr, tu-den, gdaSeparateto/on/ona
cxlovek/muzx/zxen
bratra/brat/sestra
N: number, case
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Toki Pona2001  0k~h, l~r, t~tʃ, p~f, k~ɡ, t~d, p~bUnspecified, usually LatinEnglish, Tok Pisin, Finnish, Georgian, Dutch, Acadian French, Esperanto, Croatian, ChineseNijon /nijon/-, suno-ni, seme-laSeparateona/~/~
jan/mije/meli
sama/sama mije/sama meli
~
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Ygyde2002  0l~r, i/ɪ, b/v, n~ŋ, w/vA priori alphabetA priorikijyty /kidʒɪtɪ/he-ky, e-dy, iwe-ejoClass affixes~/ije/hifi
ypy/yjepy/yfipy
hypi/yjepi/yfipi
~
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Sambahsa-
mundialect
2007  0z/dz, e/ø, t/θ, x/h, ʃ/ç, y/i, e/ə, b/v, n~ŋ, w/v, s/tsLatin
Digraphs, cluster letters, special rules
Ambiguous spellings
Proto-Indo-European, Arabic, Chinese, Indonesian, Swahili, TurkishJapan /ʒapan/*september, hoyd, quandoSeparateel/is/ia
mensc/wir/gwen
swesgen/brater/swesger
V: TAM, person, number
N: number, case*
A: number, case, gender
The word for "Japanese" is "nippon".
Only pronouns inflect for case.
Only articles inflect, and they are identical to the third-person pronouns.
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Lingwa de planeta2010  0b/v, w/v*Latin
Digraphs, cluster letters*
Ambiguous spelling
Arabic, Chinese, English, French, German, Hindi, Persian, Portuguese, Russian, SpanishNihon /nihon/ or
Nipon /nipon/
mes-nin or septemba, se-dey, wenSeparateta/lu/ela
jen/man/gina
~/brata/sista
V: TAM
N: number
[w] is an acceptable realization of /v/.
[s] and [ks] are both acceptable readings of ⟨x⟩.
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Neo Patwa2010  0b/v*, n~ŋ, w/v*LatinWorldlang?nin-luna, ta-tyen, ke-tokitokiSeparateta/~/~
yan/maga/meli
~/didi/meme
~/v/, is only used in loanwords.
The dictionary doesn't list a word for "today", but it's rife enough with similar compound words that "ta-tyen" seems like a safe bet.
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Pandunia2017  0b/v, n~ŋ, w/vLatinWorldlangniponia /niponia/mes-naw, zay-den, ki-sateSeparatele/~/~
ren/man/fem
saudar/mani saudar/femi saudar
~
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Globasa2019  0b/v*, n~ŋ, w/v*LatinWorldlangnipon /nipon/mesi-nue, nun-dina, ke-watuSeparatete/~/~
ix/manix/femix
sodar/mansodar/femsodar
~/v/ never contrasts with /b/ or /w/ in practice.
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