The palatal hook was introduced in 1921 and officially adopted in 1928. The last published IPA chart to support it was
that of 1979. The following single non-palatal consonants appear on that chart. Those attested with palatal hook are bolded and set with the hook; the hooked letters are either in Unicode or are scheduled to appear in Unicode 18 in 2026. The columns for palatal letters are omitted; they are generally redundant with the hook, though 'palatalized palatals' are described in the literature. C with hook, '
, is not a palatal letter but a script variant of '. W with hook, '
, is attested as a convenient transcription for a palatalized bilabial approximant; ɗ with a hook, ', had been used for . : • , and occur with a palatal curl, which was the preferred forms for these letters in the IPA of their era. Other non-palatal consonants listed under the 1979 chart: :, '''''' (etc.): should be typeset with the hook letter and an overstruck tilde diacritic or vice versa : [used for Czech, does not occur palatalized] : : [used for Swedish, does not occur palatalized] :the sibilant affricates
() . (The forms with a palatal curl, and , will become available with Unicode 18.) The affricate '''''' () is implied but is not listed under the 1979 chart. ==Computer encoding==