Peshalic

Background
Woogers can fill this in.

Diphthongs
ai, ei, eai, oi, oei, au, eu, eau, ou, oeu

Long Forms
Long forms of consonants are held before being released. Long forms of vowels and diphthongs are held twice as long. Long forms are written as a letter repeated except for diphthongs, i, and u.

U and diphthongs ending in u are lengthened with w.

I and diphthongs ending in i are lengthened with y.