> I spoke about it with Edgar Leitan, who is native Latvian speaker, born in Rezekne, and is Professor of linguistics specializing in oriental languages, in Vienna University.
Nothing personally against him, but "South Asian, Tibet and Buddhist Studies" is pretty far from Indo-European linguistics. Also, it's not unusual that native speakers have craziest ideas about their own languages. You don't automatically gain a deep insight into the history of your language just by being a native speaker.
Is he, though? http://univie.academia.edu/EdgarLeitan says "University of Vienna, Department of South Asian, Tibet and Buddhist Studies, PhD Student"
Nothing personally against him, but "South Asian, Tibet and Buddhist Studies" is pretty far from Indo-European linguistics. Also, it's not unusual that native speakers have craziest ideas about their own languages. You don't automatically gain a deep insight into the history of your language just by being a native speaker.