Aban

General information
Aban language is a language of Köz family spoken by around 30,000 people in a small kingdom of Aban. As many languages of the family, it has many triconsonantal words. It is also the most archaic Köz language (as Sanskrit is to IE family), which means it is crucial in reconstructing Proto-Köz.

Vowels
Diphthongs: ei /eɪ/, ai /aɪ/. More will be added later.

Classes of vowels: e-class (ë, e); o-class (o, ö); u-class (u, ü). 4th class (i, a).

Nouns
Nouns have 5 cases, nominative, genitive, dative, accusative and instrumental. Occasional umlaut can occur in irregularities.

Consonant change is fairly simple, with usually predictable fricativization, weakening (devoicing for voiced, nearly the same effect as fricativization for unvoiced) and strengthening (voicing for unvoiced, plosivization for voiced fricatives).

Consonant change: d - fricative z, weakened t, no strengthened form; p - f/f/b; b - v/p/--; t - s/h (he)/z; ŧ - y/š/č; đ - ž/ŧ/d; k - x/ŧ/g; g - q/k/--.

All outside the list is either unchanged or very predictable.

Vowel change is usually changing to its class' second vowel. But there is one irregularity, e changes to a when weakened.