At one time all the people of the world spoke the same language and used the same words.
As the people migrated to the east, they found a plain in the land of Babylonia and settled there.
References for Genesis 11:2
They began saying to each other, “Let’s make bricks and harden them with fire.” (In this region bricks were used instead of stone, and tar was used for mortar.)
Then they said, “Come, let’s build a great city for ourselves with a tower that reaches into the sky. This will make us famous and keep us from being scattered all over the world.”
But the came down to look at the city and the tower the people were building.
“Look!” he said. “The people are united, and they all speak the same language. After this, nothing they set out to do will be impossible for them!