Languages and the Races
All humans are descended from Adam and Eve, we are all part of the family of Adam and Eve.
How did the creation of the nations and their languages evolve? After the flood, Noah’s children moved to different places:
Genesis 11:1-9 "And the whole earth was of one language, and of one speech. And it came to pass, as they (Humans) journeyed from the east, that they found a plain in the land of Shinar; and they dwelt there. 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. 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. And the LORD came down to see the city and the tower, which the children of men builded. 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. Go to, let us go down, and there confound their language, that they may not understand one another's speech. So the LORD scattered them abroad from thence upon the face of all the earth: and they left off to build the city. 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."
Genesis 10:5-32 "By these were the isles of the Gentiles divided in their lands; every one after his tongue, after their families, in their nations...These are the families of the sons of Noah, after their generations, in their nations: and by these were the nations divided in the earth after the flood."
If you read all of Genesis 10:1 thru 32, it gives the genealogy of the sons of
Noah and in which directions they headed.
Acts 17:26 “And hath made of one blood all nations of men for to dwell on all the face of the earth, and hath determined the times before appointed, and the bounds of their habitation;”
The Book of Jubilees 10:22-26 "And the Lord our God said unto us: Behold, they are one people, and (this) they begin to do, and now nothing will be withholden from them. Go to, let us go down and confound their language, that they may not understand one another's speech, and they may be dispersed into cities and nations, and one purpose will no longer abide with them till the day of judgment.' And the Lord descended, and we descended with him to see the city and the tower which the children of men had built. And he confounded their language, and they no longer understood one another's speech, and they ceased then to build the city and the tower. For this reason the whole land of Shinar is called Babel, because the Lord did there confound all the language of the children of men, and from thence they were dispersed into their cities, each according to his language and his nation. And the Lord sent a mighty wind against the tower and overthrew it upon the earth, and behold it was between Asshur and Babylon in the land of Shinar, and they called its name 'Overthrow'."
As for the differences in appearance between nations, though scripture does
not say so, it would make sense that the Lord also changed their appearance to
further discourage there learning each others new language and staying together as one nation.
Yet in the future he will restore the earth to one language again.
Zephaniah 3:8-9 "Therefore wait ye upon me, saith the LORD, until the day that I rise up to the prey: for my determination is to gather the nations, that I may assemble the kingdoms, to pour upon them mine indignation, even all my fierce anger: for all the earth shall be devoured with the fire of my jealousy. For then will I turn to the people a pure language, that they may all call upon the name of the LORD, to serve him with one consent."