Paul repeats "without the law" to emphasize that it does not matter if people do not know the law of Moses. If they sin, God will judge them. Alternate translation: "without knowing the law of Moses will certainly still die spiritually" (See: [[rc://en/ta/man/translate/figs-explicit]])
God will judge sinful people according to his law. You can translate this in an active form. Alternate translation: "and who do know the law of Moses, God will judge them according to that law" (See: [[rc://en/ta/man/translate/figs-explicit]] and [[rc://en/ta/man/translate/figs-activepassive]])