Languages - Bible vs Koran

Now the whole earth had one language and the same words. And as people migrated from the east, they found a plain in the land of Shinar and settled there. And they said to one another, "Come, let us make bricks, and burn them thoroughly." And they had brick for stone, and bitumen for mortar. Then they said, "Come, let us build ourselves a city and a tower with its top in the heavens, and let us make a name for ourselves, lest we be dispersed over the face of the whole earth." And the Lord came down to see the city and the tower, which the children of man had built. And the Lord said, "Behold, they are one people, and they have all one language, and this is only the beginning of what they will do. And nothing that they propose to do will now be impossible for them. Come, let us go down and there confuse their language, so that they may not understand one another's speech." So the Lord dispersed them from there over the face of all the earth, and they left off building the city. Therefore its name was called Babel, because there the Lord confused the language of all the earth. And from there the Lord dispersed them over the face of all the earth. (Genesis 11:1-9 ESV)

In the beginning, mankind is one community. Remember Adam and Eve? How many communities is Adam and Eve? One family, one language, right? And it was so until after the flood, when God confused the languages of men (Genesis 11:7-8) because they were trying to build the tower of Babel. In the Quran, Allah seemed to have forgotten that mankind was originally one community. He talked as if mankind was never one community. (Quran 11:118).

Surah 11:118 (Sahih International)
And if your Lord had willed, He could have made mankind one community; but they will not cease to differ.

As usual, Allah seemed to have forgotten what he had done by the time he gave the Koran. He forgot about Adam and Eve!