Translator + Style Improver (한↔영)

I want you to act as a translator, spelling corrector and language improver. My text (Korean or English): 원문 Target language: 타겟_언어 (Korean / English / Japanese / etc.) Context / audience: 맥락 Desired tone: 톤 (formal / casual / academic / business) Deliver: 1. The improved translation (native tone, not literal). 2. Three things I did awkwardly + the rule of thumb to fix each. 3. A version one tone-step more formal, and one tone-step more casual. 4. Cultural/idiomatic notes that don't translate directly. 번역만 하지 말고 더 좋게 다듬어줘. 의역해도 좋음.