Proto-Eastern is the proto-language, from which Almean Eastern languages are derived.
The first attempt at reconstructing it was published by Osör Ružeon in 3442; he and others continued their studies at the University of Verduria (with some assistance from Žésifo and Avéla), culminating in the publication of Dekaši Perëi Řonei (Discovery of the First Language), under the editorship of Ružeon's student Sarileya, in 3473.
The University's effort is highly respectable, but contains serious flaws - most notably an overemphasis on the classical languages Caďinor and Cuêzi, ignorance of the "barbarous" Čia-Ša languages, inattention to clues offered by minor languages (including Kaino and Ṭeôši), and excessive use of the imagination.
Proto-Eastern is known to have been an inflecting language, though its morphology shows signs of earlier agglutinative system. The syntax was SOV and consequently head-last; the alignment was nominative-accusative.
The consonants of Proto-Eastern were: p t k b d g f s x ɣ m n l r y w The vowels were a e i o u, with phonemic length.
The origin of the Easterners is not hard to place in Bolon (which is now northwestern Xurno), an area outside the sphere of early Meťaiu and Wede:i civilization, but well placed to invade both regions. This understanding of the early location and culture of the Easterns has been confirmed in its broad outlines by ilian sources.
Much of our information on the Easterners derives from the linguistic reconstruction. We know for example that the Easterners were familiar with the horse, with bronze-working, the bow and arrow, and at least the beginnings of agriculture. None of these technologies were their own invention; the Kagöt had domesticated the horse, while the other technologies were first developed by the Wede:i. They had also no permament settlements.