While "Paleo-Balkan" languages are conventionally understood as a
linguistic areal grouping, in recent
historical linguistic research scholars propose a distinct "Balkanic" (or "Paleo-Balkanic") Indo-European branch based on shared Indo-European morphological, lexical, and phonetic innovations, as well as shared lexical proto-forms from a common pre-Indo-European substratum. The Balkanic subgroup comprises three branches of modern and well-attested ancient languages, Armenian,
Graeco-Phrygian (=
Hellenic + Phrygian) and
"Illyric" (= Albanian + Messapian). Some scholars further propose that innovations exclusively shared by Greek and Albanian point to a closer link between the latter two branches, which can thus be unified to a "
Graeco-Albanian" branch. Shared innovations include the first person singular mediopassive ending
*-mai, and lexical innovations such as
*ai̯ĝ- 'goat',
dʰeh1s- 'god'. The word for "
goat" is a remarkable common proto-form of non-Indo-European origin exclusively shared between Albanian, Armenian, and Greek. It could have been borrowed at a pre-stage that was common to these languages from a pre-Indo-European substrate language that in turn had loaned the word from a third source, from which the pre-IE substrate of the proto-form that is shared between
Balto-Slavic and
Indo-Iranian could also have borrowed it. Hence it can be viewed as an old cultural word, which was slowly transmitted to two different pre-Indo-European substrate languages, and then independently adopted by two groups of Indo-European speakers, reflecting a post-Proto-Indo-European linguistic and geographic separation between the "Balkanic" group consisting of Albanian, Armenian, and Greek, and a group to the North of the Black Sea consisting of Balto-Slavic and Indo-Iranian. A remarkable PIE root that underwent in Albanian, Armenian, and Greek a common evolution and semantic shift in the post PIE period is PIE
*mel-i(t)- 'honey', from which Albanian
bletë, Armenian
mełu, and Greek μέλισσα (
mélissa) or μέλιττα (
mélitta) derived. However, the Armenian term features
-u- through the influence of the PIE
*médʰu 'mead', which constitutes an Armenian innovation that isolates it from the
Graeco-Albanian word. Innovative creations of
agricultural terms shared only between Albanian and Greek were formed from non-agricultural PIE roots through semantic changes to adapt them for agriculture. Since they are limited only to Albanian and Greek, they could be traced back with certainty only to their last common IE ancestor, and not projected back into
Proto-Indo-European. ==See also==