New Defender's Study Bible Notes
11:8 scattered them abroad. The tower had been completed and was actively in use, but the city was still unfinished. Probably all families except that of Nimrod himself departed from Babel, leaving him and his immediate family the burden of developing his own tribe at Babel as best they could. These probably became the Sumerians. The others scattered into various regions as already described in Genesis 10, some eventually developing great civilizations. This account, originally written by Shem (Genesis 11:10), is reflected in somewhat distorted form in the legends of other nations, including a tablet excavated at Ur. There is no better scientific theory to date for the origin of the various families of languages. All such theories seem to point to an origin in the Middle East.
11:8 they left off. In addition to the Babel tablet found at Ur (see note above), an inscription purportedly made by Nebuchadnezzar (sixteen centuries after Nimrod) on the base of the remains of a tower in Borsippa (a Greek word possibly meaning “tongue-tower”), some seven miles southwest of Babylon, claims that he (Nebuchadnezzar) was rebuilding the base of the ancient tower of Babel.