Proto-Riphic
Proto-Riphic is a descendant of Late PIE with a Proto-Germanic and Proto-Balto-Slavic hybrid aesthetic.
Phonology
Proto-Riphic is a satem language, which means that the original PIE palatovelars are fronted to alveolar. It also underwent a sound shift similar to Grimm's law:
- PIE voiceless stops -> voiceless fricatives
- PIE "plain voiced"/glottalic stops -> voiceless stops
- PIE "voiced aspirates" -> voiced stops
Unlike in Proto-Germanic, though, there is no Verner's law in Proto-Nithish.
Proto-Riphic doesn't have a broad/slender contrast in consonants unlike its descendant Nithish.
In addition, Proto-Nithish has lots of loanwords from Uralic languages and Proto-Indo-Iranian, which did not undergo Grimm's law except when Iranian languages have it (i.e. *pr -> fr etc.)
Vowels
A hybrid of Proto-Slavic and Thedish?
Morphology
Proto-Riphic retained all 8 cases of PIE, as well as singular, dual, and plural forms of nouns. Its verbal morphology, though, is much simpler. It's notable for having an evidentiality distinction in verbs from the original PIE sigmatic aorist.