Proto Vauqun-Adzovъd

Summary
Descendant of Proto Csillan. Basically Csilla's equivalent of PIE. Unlike PCS, PČN was actually reconstructed. In certain places I'll use blue writing to highlight etymology information that couldn't be reconstructed yet is known to me 'cuz I made the lang :P

Vowels
As can be inferred from the graph above, most vowel qualities distinguished length and some nasality, while only two have only one form which makes sense when you consider that those two qualities only existed as the product of umlaut that did not affect long vowels (and all nasal vowels are long.)