Yes. Hebrew was the original - Aramaic is very close to it. One popular "manner of speech" seen throughout the new testament reads, 'and he spoke to them, saying..." which is a Hebrew structure. Tons of evidence is seen when Jesus spoke to Paul after knocking him to the ground blind "in Hebrew."
Good point. We should concentrate on actually completing a pass of the entire bible before we start arguing foreign languages and pet verses. When read, the new testament is interpreted perfectly by the old testament as your right hand, by design, folds into your left.