The Greek and Hebrew that is translated as “birthright” in most English translations is translated in Guhu-Samane as “the right of the first child of the vine.”
Source: Ernest Richert in The Bible Translator, 1965, p. 81ff.
וַיֹּ֖אמֶר יַעֲקֹ֑ב מִכְרָ֥ה כַיּ֛וֹם אֶת־בְּכֹֽרָתְךָ֖ לִֽי׃
The Greek and Hebrew that is translated as “birthright” in most English translations is translated in Guhu-Samane as “the right of the first child of the vine.”
Source: Ernest Richert in The Bible Translator, 1965, p. 81ff.