International Auxiliary Language alphabet

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Consonants

Sounds represented by an ISO 646 letter in IPA but rarely used in IAL

  • /c/
  • /q/
  • /y/

Consonants having no ISO 646 representation in IPA

Some consonants found in several IALs are not represented by an ISO 646 letter in IPA. Three have a single letter in IPA, one of these has an widespread alternative

  • /ʃ/ (U+0283, IPA 134)
  • /ʒ/ (U+0292, IPA 135)
  • /ɡ/ (U+0261, IPA 110) = g (U+0067)

Four are affricates, and have two letters in IPA, they can often be written decomposed:

  • /t͡s/ = /ts/
  • /t͡ʃ/ = /tʃ/; Note: Polish distinguishes between them
  • /d͡z/ = /dz/; Note: Polish distinguishes between them
  • /d͡ʒ/ = /dʒ/

That leaves two characters that are not in ISO 646: ʃ, ʒ.

They can be encoded with c, q, y.

ILA-2015 uses:

  • c = /ʃ/
  • y = /ʒ/
ISO 639-3 code Alphabet name Non ISO 646 letters Diacritics Multigraphs Sound, which in IPA is ISO 646, is described by different letter Letters existing in IPA but having a different meaning
- ILA-2016 No No No No Yes (c /ʃ/, q /ʒ/)
lfn Lingua Franca Nova No No No Yes (c /k/) Yes (j /ʒ/, x /ʃ/)
rmv Romanova No No No Yes (c /k/) Yes (j /ʃ/)
ina Interlingua No No Yes (qu /kw/ or /k/) Yes (c /k/) No
ido Ido No No Yes (ch /tʃ/, qu /kw/, sh /ʃ/) Yes (c /ts/, q /k/, x /ks/ or /ɡz/, y /j/) Yes (j /ʒ/, sh /ʃ/)
nov Novial No No Yes (ch /tʃ/, sh /ʃ/, y /j/) Yes (q /k/, x /ks/) Yes (j /ʒ/, sh /ʃ/)
igs Interglossa No No Yes (ph, th, ch, rh -> /f/, /t/, /k/, /r/.) Yes (c /k/, q /k/, x /ks/, z /ts/) No
epo Esperanto No Yes (ĉ, ĝ, ĥ, ĵ, ŝ, ŭ) No Yes (c /ts/) No
- Mundolinco [1] No No No Yes (c /k/) No
- Glosa No No Yes (sc /ʃ/) Yes (q /kw/, x /ks/) Yes (c /tʃ/, sc /ʃ/)
- Sambahsa[2] No No Yes (ch /tʃ/, sh /ʃ/, and more) Yes (q /x/, and more?) Yes (j /ʒ/, ch /tʃ/, sh /ʃ/, and more?)
- Idiom neutral No No Yes (sh /ʃ/) Yes (y /j/) Yes (c /tʃ/, j /ʒ/, sh /ʃ/)
- Lingwa de planeta No No Yes (ch /tʃ/, sh /ʃ/) Yes (x /gs/, j /dʒ/, z /dz/) Yes (c in ch /tʃ/, j /dʒ/, z /dz/)
- Interslavic No Yes (č /tʃ/, ń /nj ~ nʲ ~ ɲ/, š /ʃ/, ž /ʒ/ ) dž, but similar to or same as d+ž Yes (c /ts/, y /i ~ ɪ ~ ɨ/) Yes (č /tʃ/, š /ʃ/, ž /ʒ/)
- Uropi Yes (ʒ /ʒ/) No No No Yes (c [ʃ])