What would have been the consequence if every human spoke the same language, at the Tower of Babel?
All humans did speak the same language when they where building the tower of Babylon... It was after God stopped them that He divided them and caused them to have many different languages..
The story of babal is as follows::
Genesis 11: KJV
1 "And
the whole earth was of one language, and of one speech. {2} And it came to pass, as they journeyed from the east, that they found a plain in the land of Shinar; and they dwelt there. {3} And they said one to another, Go to, let us make brick, and burn them throughly. And they had brick for stone, and slime had they for morter. {4} And they said, Go to, let us build us a city and
a tower, whose top may reach unto heaven; and let us make us a name, lest we be scattered abroad upon the face of the whole earth. {5} And the LORD came down to see the city and the tower, which the children of men builded. {6} And the LORD said, Behold, the people is one, and they have all one language; and this they begin to do: and now nothing will be restrained from them, which they have imagined to do. {7} Go to, let us go down, and there
confound their language, that they may not understand one another’s speech. {8} So the
LORD scattered them abroad from thence upon the face of all the earth: and they left off to build the city."