Aramaic diaspora in Greek speaking countries?

[judge]

In the whole NT there is no proof that Paul was Greek speaking or at least fluent.
When he arrived into a new city, he usually went to Jews first. On the other side he spoke Aramaic and it is clear.

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Even in Acts there is no indication Paul spoke greek,


21:37 As the soldiers were about to take Paul into the barracks, he asked the commander, ?May I say something to you??
?Do you speak Greek?? he replied. 38 ?Aren?t you the Egyptian who started a revolt and led four thousand terrorists out into the wilderness some time ago??

39 Paul answered, ?I am a Jew, from Tarsus in Cilicia, a citizen of no ordinary city. Please let me speak to the people.?

40 After receiving the commander?s permission, Paul stood on the steps and motioned to the crowd. When they were all silent, he said to them in Aramaic[a]: