Āj

Āj is the language formerly spoken north of the Köz tribes (although unrelated to any of the Köz languages) which is the ancestor of a vast majority of the languages spoken west of the Dividing Range of the Old World.

Phonology
Āj had a moderately-sized inventory of 26 consonants and a rather large one of 15 vowels (8 short and 7 long)

Grammar
The grammar of Āj is fusional and (in verbs) agglutinating and has few irregularities.

Nouns
Āj nouns distinguish 8 cases, 3 numbers and definiteness in singular.

Most nouns have a second (accusative) stem, used for applying certain case endings.

Consonant stems
The consonant stems in Āj are mostly of common gender (with very few exceptions) and are the primary declension class.

An example consonant-stem noun is mōn, mōni "friend"

ā-stems
These stems constitute another major declension class. As evident from their name, they always end in <ā>.

An example ā-stem is ədābā, ədābo "coin"

Verbs
The verbs have 2 classes, classified by endings: regular (-ād, -ūd, -ø̄d, -īd) and -əd. The ending in -īd verbs is always stressed, and -əd has a different conjugation. The only difference in the inflection of the regular class is the root vowel. Short vowels (except <ə>) and <ē ō> don't occur before the -d ending. Most irregularities in verbs are in their stem forms.

Āj non-defective verbs inflect for (undecided), 3 persons, 3 numbers (singular, dual, plural) and an obviative (4th person).

Below is an example of the example regular verb, āɣūd "to build", conjugated in the indicative mood. Pretty self-explanatory.