International Auxiliary Language alphabet
Apart from affricates, which often could be represented by a sequence of the composing parts (e.g. not possibly for Polish which distinguishes between /t͡ʃ/ /tʃ/), two consonants found in several IAL alphabets are not represented by an ISO 646 letter in IPA (omitting the IPA-g which is not the ISO 646-g, but visually similar): [ʃ], [ʒ].
| ISO 639-3 code | Alphabet name | Diacritics | None ISO 646 letters | Multigraphs | Letters existing in IPA but having a different meaning |
|---|---|---|---|---|---|
| - | ULA | No | No | No | Yes (q [ʃ], y [ʒ]) |
| lfn | Lingua Franca Nova | No | No | No | Yes (c [k], j [ʒ], x [ʃ]) |
| rmv | Romanova | No | No | No | Yes (c /k/, j /ʃ/) |
| ina | Interlingua | No | No | Yes (qu [kw] or [k]) | Yes (c (k)) |
| ido | Ido | No | No | Yes (ch /t͡ʃ/, qu /kw/, sh /ʃ/) | Yes (c /t͡s/, j /ʒ/, q /k/, x /ks/ or /ɡz/, y /j/) |
| nov | Novial | No | No | Yes (ch /tʃ/, sh /ʃ/, y /j/) | Yes (j /ʒ/, q /k/, x /ks/) |
| igs | Interglossa | No | No | Yes (ph, th, ch, rh -> /f/, /t/, /k/, /r/.) | Yes (c /k/, q /k/, x /ks/, z /ts/) |
| epo | Esperanto | Yes (ĉ, ĝ, ĥ, ĵ, ŝ, ŭ) | No | No | Yes (c /t͡s/) |
| - | Mundolinco [1] | No | No | No | No |
| - | Glosa | No | No | Yes (sc /ʃ/) | Yes (c /tʃ/, q /kw/, x /ks/) |
| - | Sambahsa[2] | No | No | Yes (ch /tʃ/, sh /ʃ/, and more) | Yes (j /ʒ/, q /x/, and more) |
| - | Idiom neutral | No | No | Yes (sh /ʃ/) | Yes (c /tʃ/, j /ʒ/, y /j/) |
| - | Lingwa de planeta | No | No | Yes (ch /tʃ/, sh /ʃ/) | Yes (c in ch /tʃ/, x /gs/, j /d͡ʒ/, z /d͡z/) |
| - | Uropi | No | Yes (ʒ /ʒ/) | No | Yes (c [ʃ]) |
| - | Interslavic | Yes (č /tʃ/, ń /nj ~ nʲ ~ ɲ/, š /ʃ/, ž /ʒ/ ) | No | dž, but similar to or same as d+ž | Yes (c /ts/, y /i ~ ɪ ~ ɨ/) |