May I suggest using a translation tool like Google Translate or Papago while playing the game on the Korean server? These tools allow you to input text in Korean and get a translation in English almost instantly. You can have the translation tool open in a separate window or on a second screen while playing the game to help you understand the text in real-time.
Another option is to look for fan-made translation patches or mods specifically for the game you are planning to play on the Korean server. Some dedicated fans create translation patches to convert in-game text from Korean to English, making it easier for international players to enjoy the game.
Remember to always be cautious when using third-party tools or mods, as they may not always be officially supported and could potentially violate the game's terms of service.