§ 02 · King James Bible
Genesis 11:9
Therefore is the name of it called Babel; because the LORD did there confound the language of all the earth: and from thence did the LORD scatter them abroad upon the face of all the earth.
Simple English
So, they named it Babel because God mixed up everyone's language there. Then God spread the people all over the world in different places.
* Work in progress - there may be occasional inaccuracies