Why was the official language of the government of the byzxantine empire different than the language the people spoke

How does the concept of competition relate to the arms race between the us and the soviet union during the cold war?

Which nation most to bail out greece’s failing economy?

To what extent did mary lease's concepts of justice, freedom, and equality agree with those of samuel gompers and emilio aguinaldo? how did they compare with those of the pinkertons at homestead?