International Auxiliary Language alphabet

Some consonant sounds found in several IAL alphabets are not represented by an ISO 646 letter in IPA. Three have a single letter in IPA, one 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/
• /d͡ʒ/ = /dʒ/

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

ISO 639-3 code	Alphabet name	None 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
-	ULA-1994	No	No	No	No	Yes (c [ç] q [ʃ], y [ʒ])
-	ULA-2015	No	No	No	No	Yes (c [ʃ], q [ç] or [ɕ], y [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	No	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 /d͡ʒ/, z /d͡z/)	Yes (c in ch /tʃ/, j /d͡ʒ/, z /d͡z/)
-	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])