When did the Greeks begin to view outsiders as "barbarians"?

Name: When did the Greeks begin to view outsiders as "barbarians"?
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The term "barbarian" was originally used by the Greeks to describe anyone who did not speak Greek. However, after the Persian Wars in the 5th century BCE, the Greeks began to view the Persians and other non-Greek peoples as barbarians due to their cultural and social differences, as well as their perceived threat to Greek autonomy.

When Did the Greeks Begin to View Outsiders as "Barbarians