En réponse à Mark J. Reed :

>Eehhh . . . maybe.  But then what is the difference between [c] and [t_j]?

[c] is palatal all along, even when you begin to pronounce the sound. The
whole phone is at *one* PoA. With [t_j], you begin dental or alveolar
(whatever your own kind of [t] is) and end up palatal. During the phonation
of [t_j], you *change* the PoA.

That's why palatalisation is a diacritic in IPA: you can apply it to any
consonant, except palatal ones ;)) (and indeed, languages like Irish Gaelic
and Russian basically double their consonant sets by adding palatalised
consonants). On the other hand, palatal consonants are specific consonants
at a single well-defined PoA.

Christophe Grandsire.

You need a straight mind to invent a twisted conlang.