Rhythoed
Feiden is a Wiobic language inspired by Indo-Iranian languages and English. It turns the palatal series of Proto-Wiobic into a sibilant series.
Modern Feiden is an official language of the Bjeheondian states of Plüeng Dăthney and Plüeng Srăchiem.
Todo
p mp b -> φ b p (pronounced /pʰ b p/)
c nc J -> h ź ś (pronounced /h ʑ ɕ/)
velars and labiovelars merge
ç -> s (as in Wiobian spelling); s -> x except in clusters
r -> d or l, but ř stays as ř (written r); coronal + ř clusters become retroflex
Great Vowel Shift after umlaut
nsaati -> ziiθ /zi:tʰ/ ntřaag -> źrauk /ɖʐauk/
Phonology
Umlaut in Feiden works like Welsh; there is both i- and a- umlaut but no u-umlaut. It's no longer productive in the modern language.
Morphology
Feiden is analytic like Tsjoen, and has developed head-initial tendencies due to contact with Hlou-Ku languages (read: "Hlou-Ku people learning an older stage badly")
Lexicon
The Feiden lexicon has been heavily influenced by the neighboring Hlou-Ku languages, especially Shumian. Shumian words are often used in advanced vocabulary in Feiden as they are easy to compound (c.f. Sino-Korean).