HEL Justinian is considered to be the last Roman Emperor to speak Latin as a first language. What does this fact imply about the changes in the Roman Empire at that time?

The Western Empire had lost most of its political, religious, and economic power.
The conquests of Justinian had succeeded in making the Romans allies of the Byzantines.
The Eastern Empire had been influenced by the linguistic changes taking place in "barbarian" lands.
The empire of Justinian rejected the concept of a single Roman Empire.