> If PIE is dated to circa 5000 BCE, what would be the areal situation
> of substratum languages which evolved into PIE? Have there been any
> studies to gloss the substratum words which might have constituted
> the parole between de-glaciation and ca. 5000 BCE?
Firstly, "substrate" refers to non-PIE languages - and yes there have been
studies in these words in PIE, but I don't think that's what you mean. I'm
guessing you mean the language(s) that develop into PIE. Here it is harder
to find the vocabulary - all we have is what we can reconstruct, along with
loans from Uralic, Semitic etc. There are various attempts to construct a
pre-PIE morphology, which have had some success, at least in outlining the
possibilities. There seems to be a certain degree of acceptance of the idea
that pre-PIE was not an "accusative" language, but was ergative, or at least
active, or at least partially so, and more so than PIE. It is fairly clear
that there were stative and active conjugations of verbs, and contrasting
stems of nouns and verbs.
But I suspect this is not what you are trying to prove.
Peter