'Barbarians' in the Bible

For You have turned the city into a pile of rocks,a fortified city, into ruins;the fortress of barbarians is no longer a city;it will never be rebuilt.

like heat in a dry land,You subdue the uproar of barbarians.As the shade of a cloud cools the heat of the day,so He silences the song of the violent.

You will no longer see the barbarians,a people whose speech is difficult to comprehend—who stammer in a language that is not understood.

I am obligated both to Greeks and barbarians, both to the wise and the foolish.