Biblical scholars have long generally agreed that the Shinar or Senaar of Genesis 11 where the Noahites all gathered after the flood is the Sumer of ancient Mesopotamia.
This is supported by the similarity in the two Semitic names (Sumer is an Akkadian word), the matching geographical descriptions and the association with Babel, Akkad and Uruk.
In Genesis 10.10 the empire of Nimrod is described as encompassing Babel, Akkad and Uruk in the land of Shinar. This seems to describe the Akkadian Empire which came to rule over Mesopotamia, the Levant and Anatolia.
In Genesis 11 the Noahites all gathered in Sumer/Shinar and there they shared in the same speech and custom:
“1And all the earth was one lip, and there was one language to all. 2And it came to pass as they moved from the east, they found a plain in the land of Senaar, and they dwelt there.”
The Sumerian language is known today as a linguistic isolate, but was once thought to be the origin of the Indo-European languages. A comparison between Sumerian and Indo-European was made by Charles Autran already in 1925, finding many similar roots and even suffixes, like -ta for the origin (Sanskrit -tas), -bi for the instrumental (Sanskrit -bhis).
Gordon Whittaker, since 1998, has identified so-called Euphratic, a substratum or superstratum in Sumerian, with an Indo-European language. Particularly interesting is his analysis of the phonetic values, without meaning in Sumerian, of pictographic symbols, which in some cases can suggest an IE connection.
The symbol for a fish is read peš, which recalls PIE *pisk/peisk- ‘fish’, perhaps from the Indo-European root pi- ‘to drink’ and the frequentative suffix -sk-. The symbol of a bird is read hu, and can be compared with PIE *hwi/hwai- ‘bird’ (notably Armenian hav meaning ‘chicken’).
The logogram for ‘dog’, with an animal head, is read lik, and recalls PIE *wlkwa- ‘wolf’, especially Greek lykos. The logogram for ‘fox’, with the symbol of a fox’s head with large ears, is read lib/lub, comparable to the PIE *wlpe- ‘fox’ (Latin vulpes, Greek alopex), which is apparently an offshoot or variant of the previous one (with kw > p).
The phonetic values for ‘prince’ are nar/nara, as in the Sanskrit term for ‘man, hero’ (ner/nir). In a publication of 2012, Whittaker has suggested laws of phonetic change from Euphratic to Sumerian, which is a necessary aspect in a scientific demonstration of the existence of this Indo-European language.
In support he cites other examples of phonetic values, like sah/suh for the sign ‘thread+thread’, recalling Sanskrit sū-tra-‘thread’, from the root s(y)ū- ‘to sew’, corresponding to Latin su-ere. Also of note is semed for the sign ‘one’, comparable to the PIE root *sam-, found e.g. in English same and Latin semel ‘once’.
Also Aleksi Sahala, Assyriologist of the University of Helsinki, has between 2009 and 2013 proposed 30 Sumerian words with a possible common etymology with Indo-European.
In 1927, the British explorer and scholar of Sanskrit, Laurence Waddell published a book with the title Aryan Origin of the Alphabet and Sumer-Aryan Dictionary.
Sumerian civilization was generally bilingual with the general populace being fluent in both Sumerian and Akkadian, the earliest attested Semitic language. Of course both languages used the same Sumero-Akkadian cuneiform.
Linguists regard the relationship between Sumerian and Akkadian as a “sprachbund”; a group of closely related languages with profound influence on one another from lexical borrowing on a large scale, to syntactic, morphological, and phonological convergence.
The Sumerian language is somewhat of a mystery to scholars. It is an isolate with no clear ancestors or descendants, but also with clear relationships with both Afro-Asiatic and Indo-European languages and potentially with other contemporary linguistic isolates such as Elamite.
Thus I would identify Sumerian or its parent language as the the united tongue of the Noahites described in Genesis 11.1. This explains why it is a distinct isolate with such diverse affinities with many far-flung languages such as Uralic, Kartvellian, Basque, Sanskrit and Armenian as well as contemporary Akkadian.
‘The Linguistic Developments of the Shemites, Hebrews and Israelites’
In Shinar/Sumer the Noahites built ziggurats reaching to the sky. Ziggurats had spiritual significance to the ancient Mesopotamians who would erect altars at their peaks where they were closest to the heavens.
“3And a man said to his neighbour, Come, let us make bricks and bake them with fire. And the brick was to them for stone, and their mortar was bitumen. 4And they said, Come, let us build to ourselves a city and tower, whose top shall be to heaven, and let us make to ourselves a name, before we are scattered abroad upon the face of all the earth.”
The Sumerians introduced urban civilization and expanded their territory across Mesopotamia as far as Iran and Anatolia. Mesopotamian culture has, from ancient Sumer down to Babylon, been a very morally and sexually permissive culture. Lewd behavior was the norm with people frequently and freely enganging in public sex acts and all manner of sexual perversion.
The pagan cults of Mesopotamia were among the most profane in all history. Temple prostitution, ritual miscegenation and human sacrifice were well known to the pagans of ancient Sumer.
Ancient Sumer had degenerated into an immoral society in a short time quickly becoming an imperialistic, decadent, materialistic, perverse and idolatrous society. They reached towards the heavens and God above saw their pridefulness and sinfulness:
“5And the Lord came down to see the city and the tower, which the sons of men built. 6And the Lord said, Behold, there is one people, and one lip of all, and they have begun to do this, and now nothing shall fail from them of all that they may have undertaken to do. 7Come, and having gone down let us there confound their tongue, that they may not understand each the voice of his neighbour. 8And the Lord scattered them thence over the face of all the earth, and they left off building the city and the tower. 9On this account its name was called Confusion, because there the Lord confounded the languages of all the earth, and thence the Lord scattered them upon the face of all the earth.”
From this time hence forth the Noahites began to disperse from Mesopotamia through the whole of the Fertile Crescent, the Mediterranean Basin, and other points in Eurasia and North Africa.
These nations include the ancient tribes of Europe such as Tartesians, Rhodians, Ionians, Thracians and Lydians and Etruscans as well as White tribes of the Near East like the Medes, Aramaeans, Persians and Pharaonic Egyptians among others.
These are the ancestors of all Caucasians alive today and the broadest possible group of recipients of any promise or blessing from God.
‘Adam: The Patriarch of One Race’
‘The Tree of Life: Redemption of the Adamic Race’