On {debtor} (opheilet(8873)) see  Ga 5:3 . {Both to Greeks and
to Barbarians} (Hell(8873)in te kai barbarois). The whole human
race from the Greek point of view, Jews coming under arbarois.
On this word see  Ac 18:2,4  1Co 4:11  Col 3:11  (only N.T.
instances). The Greeks called all others barbarians and the Jews
termed all others Gentiles. Did Paul consider the Romans as
Greeks? They had absorbed the Greek language and culture.