Language scratchpad/Altlangs/Alternate reconstructions/Proto-Japonic scratchpad/Proto-Ryukyuan scratchpad

This subarticle lists some of my notes on Proto-Ryukyuan.

Disclaimer: The entirety of this article's contents is to be considered science fiction. They are not, in any way, verified and accepted reconstructions of real-life proto-languages, even if they are largely based on accepted reconstructions.

Phonology
Proto-Ryukyuan is reconstructed with a typical five vowel system:

Verbs
In general, there are six conjugational classes of Proto-Ryukyuan verbs, of which the first is most likely the only productive class. The six classes have equivalents in Classical Japanese:
 * First conjugation (athematic): CJ quadrigrade
 * Second conjugation (thematic): CJ monograde and bigrade
 * Third conjugation: CJ s-irregular
 * Fourth conjugation: CJ k-irregular
 * Fifth conjugation: CJ r-irregular
 * Sixth conjugation: CJ n-irregular

The third, fourth and sixth conjugations each only have one verb (*se-/*as- "to do", *ko- "to come", *sin- "to die"), while the fifth conjugation only has three verbs and one suffix (*ar-, *wor-, *jar-, *-itar-). The sixth conjugation is difficult to reconstruct, as most languages have merged it with the first conjugation.

The following is a comparison of the six conjugational classes' base forms:

The following is a comparison of selected inflectional forms:

The conclusive, in general, was formed periphrastically, using *womu or *wori attached to the infinitive. The latter is comparable to the Classical Japanese r-irregular conclusive -ri. The -mu suffix, if used, generally evolved into an indicative marker.