what was the language commonly spoken in the empire mentioned above?
Latin
Roman Empire
The language of the Romans was Latin, which Virgil emphasizes as a source of Roman unity and tradition. 
what is the time period of the middle ages? 5th to the late 15th century which was the most powerful empire of the time? The Roman Empire which religion spread during this time period? Islam was any civilization destroyed during this time? UNANSWERABLE
wiki:25666676
Roman Empire [SEP] Languages
The language of the Romans was Latin, which Virgil emphasizes as a source of Roman unity and tradition. Until the time of Alexander Severus (reigned 222–235), the birth certificates and wills of Roman citizens had to be written in Latin. Latin was the language of the law courts in the West and of the military throughout the Empire, but was not imposed officially on peoples brought under Roman rule. This policy contrasts with that of Alexander the Great, who aimed to impose Greek throughout his empire as the official language. As a consequence of Alexander's conquests, koine Greek had become the shared language around the eastern Mediterranean and into Asia Minor.