Ancient Greek civilization flourished from the period following Mycenaean civilization, which ended about 1200 BCE, to the death of Alexander the Great, in 323 BCE. By that time, Greek cultural influence had spread around the Mediterranean and, through Alexander the Great's campaign of conquest, as far afield as India.
The language could not be recognized by the Japanese and it let information be spread threw to Americans without the
Japanese being able to find out what they are saying.