https://amazingbibletimeline.com/blog/cush/
Isaiah 11:11. Cush as one of the nations where Lord recovered the “remnant of his people”.
http://buzzardhut.net/index/htm/Babylon/Nimrod.htm
It was in Mesopotamia that the first cities were built after the flood, and the first of these was quite naturally named after the very first city built by man before the flood—Enoch. Due to vagaries of linguistic permutation, this name has come down to us as Erech or Uruk in Sumeria. In all there were seven major cities built near the head of the Persian Gulf, leading to the name "Land of the Seven Cities" commonly found in the early mythologies of the world. These seven cities are enumerated in Genesis as those which were conquered by Nimrod, establishing the world's first empire. The earliest Babylonian legends tell of a conquering people who came up out of the Persian Gulf and established an empire from these cities. This seems to fit well with what we know of the movements of Nimrod in his early career. He was a native of Ethiopia and was widely traveled among the few populated areas of those days. When he set out to build himself an army of conquest, he recruited from his "cousins" the descendants of Sheba and Dedan who had come up through Arabia to settle on the Asian mainland at the Straight of Hormuz and on the Indus river in what is now Afghanistan (these people were the Dravidians who were driven southward into India by the later Aryan invasion). After raising his army, Nimrod ferried them up the gulf in the world's first naval armada, and conquered his empire.
[…]
If people could not communicate with each other, they could hardly cooperate with each other. This primeval confusion of tongues emphasizes what modern man often fails to realize: the real divisions among men are not racial or physical or geographic, but linguistic. When men could no longer understand each other, there was finally no alternative for them but to separate from each other.
If anyone is inclined to question this explanation of the origin of the major differences among languages, then let him offer a naturalistic explanation that better accounts for all the facts. No one has done so yet. Obviously a miracle was involved, but the gravity of the rebellion warranted God's special intervention.
Although the major language groups are so different from each other as to make it inconceivable that they could have evolved from a common ancestral language group (except, as noted above, by such a long period of racial segregation as to cause the corresponding races to evolve to different levels themselves), the very fact that all the languages can be evaluated by common principles of linguistics, and that people can manage to learn other languages than their own, implies an original common cause for all of them. Noam Chomsky, who is one of the world's foremost linguists, is convinced that languages, though completely different on the surface, reflect an underlying commonality related to the fundamental uniqueness of man himself.
Besides the identification of Cush where God will reclaim some of his people from in Isaiah 11, that is also when the "shoot from the branch of Jesse" is prophecized, 'whose reign would destroy all evil and bring peace to the earth.'
https://www.ligonier.org/learn/devotionals/shoot-jesses-stump/