You certainly said, “have made expansive changes to several languages, including Chinese, Korean, Japanese and Hungarian languages.”
However, After I checked the game, the Korean translation have NOT changed at all, not a single word.
Koreans diligently collected translation problems and researched them so diligently that they organized them into spreadsheets for Age of Empire 4.
I’ll give you the URL again. Please be sure to check and we will await a response from the developer.