The voiced palatal trill is a type of consonantal sound, potentially used in some languages. There is no symbol for it in the International Phonetic Alphabet although if necessary ⟨ᴊ⟩, a small capital version of the Latin letter j,[citation needed] or ⟨ʀ̟˖˖˖⟩ can be used. The voiced post-palatal trill is a retracted version of the voiced palatal trill, though it is unlikely that it occurs in any languages.
In the IPA chart it is marked as possible.[1] However, the extIPA chart marks it impossible,[2] and in fact it is not strictly impossible, but very difficult to pronounce.[3]
Some languages have the voiced alveolo-palatal trill. However in the languages that have it, it is not pure alveolo-palatal, but rather palatalized dental/alveolar. The symbol that represents the voiced palatalized alveolar trill is ⟨rʲ⟩ and the alveolo-palatal one is represented as a laminal retracted version ⟨r̻˗ʲ⟩ or the retracted diacritic can be omitted ⟨r̻ʲ⟩ because ⟨r⟩ alone is dental, alveolar, and postalveolar.
The fricative trill is the same, but with simultaneous frication, though like the voiced post-palatal trill, it is unlikely that it occurs in any languages.
