번역하시느라 고생 많이 하셨어요.
=> You took much pains to do the translation. (literal)
=> I thank you for taking so much pains to do the translation. (what's implied)
한국어 어려운 문제있으면 제가 언제든지 도와드릴께요.
=> 한국어(에서) 어려운 문제(가) 있으면 제가 언제든지 도와드릴게요 (꼐요 -> 게요)
=> If there are difficulties (for you) with Korean, I'll help you anytime.
=> Whenever you have difficulties with Korean, I'll help you.