Proto-Average

Phonology
Molbi has a simple phonological inventory, with a total of 14 consonants and 5 vowels, plus diphthongs.

Consonants

 * Except for in deliberate speech, /h/ disappears when in the intervocalic position. Despite this, it remains written as if it were pronounced.
 * /s/ is realized as /z/ in the intervocalic position, but is always written as s.

Vowels

 * The possible diphthongs are /aj/, /oj/, /aw/, and /ew/.
 * When unstressed, /a/ tends to become [ɐ], and /e/ becomes [ɛ]. However, they are still written as a and e, respectively.

Orthography
Almost all phonemes in Molbi are written the same as they are in IPA. The two exceptions are: /ɾ/ is written as r, and /j/ is written as y.

Stress
Stress regularly falls on the second-to-last syllable.

Phonotactics
The syllable structure of Molbi is (C)V(l, m, n, r.)

Nouns
Nouns are declined by both their case and number. While number is optional, nouns in Molbi must be given a case. Modifiers of nouns do not agree in case.

Cases
Molbi is a heavily agglutinative language, and nouns can be inflected by a variety of prefixes for multiple different cases. Only the head word of a noun phrase is marked for case.

The following table uses the word miru (sky) as an example.

Number
Number is not required to be marked in Molbi, and is frequently omitted, especially when context makes a noun's number clear. However, marking number with a suffix is not uncommon.

The following table again uses miru (sky) as an example.