I was reading 2 Maccabees chapter 7,
7 After the first brother died in this manner, they led forward the second one with mockery. They ripped off the skin of his head along with the hair and demanded, “Will you eat before every part of your body is punished limb by limb?”
8 But he answered in his native language, “Not at all.” Therefore, this brother also received in turn the same punishment as the first.
9 With his last breath he said, “You, who are marked out for vengeance, may take our present life, but the king of the universe for whose laws we die will resurrect us again to eternal life.”
I am wondering if the refusal to speak Greek in this case was simply a way of rejecting every form of Hellenization (even linguistic) or if there is/was any halachic requirement that only Hebrew be spoken, at least in religious matters.