▁pe op les . ▁The ▁existence ▁of ▁such ▁a ▁language ▁is ▁widely ▁accepted ▁by ▁special ists ▁in ▁lingu istics , ▁who ▁have ▁re construct ed ▁a ▁broad ▁outline ▁of ▁the ▁language ▁by ▁comparing ▁the ▁existing ▁K art vel ian ▁languages ▁against ▁each ▁other . ▁Several ▁lingu ists , ▁namely , ▁Ger hard ▁De eters ▁and ▁Georg y ▁K lim ov ▁have ▁also ▁re construct ed ▁a ▁lower - level ▁proto - language ▁called ▁Pro to - K arto - Z an ▁or ▁Pro to - Ge org ian - Z an , ▁which ▁is ▁the ▁ancest or ▁of ▁K arto - Z an ▁languages ▁( includes ▁Georg ian ▁and ▁Z an ). ▁ ▁In flu ences ▁ ▁The ▁ab la ut ▁patterns ▁of ▁Pro to - K art vel ian ▁are ▁highly ▁similar ▁to ▁those ▁of ▁the ▁Ind o - Europe an ▁languages , ▁and ▁so ▁it ▁is ▁thought ▁that ▁Pro to - K art vel ian ▁interact ed ▁with ▁Ind o - Europe an ▁at ▁a ▁relatively ▁early ▁date . ▁This ▁is ▁rein for ced ▁by ▁a ▁fairly ▁large ▁number ▁of ▁words ▁borrow ed ▁from ▁Ind o - Europe an , ▁such ▁as ▁the ▁Pro to - K art vel ian ▁* m ḳ erd - ▁( bre ast ), ▁and ▁its ▁possible ▁relation ▁to ▁the ▁Pro to - Ind o - Europe an ▁* <0xE1> <0xB8> <0xB1> erd - ▁( heart ). ▁Pro to - K art vel ian ▁* ṭ ep - ▁( w arm ) ▁may ▁also ▁be ▁directly