Thanks for reviving Korean translation on recent Experimental Build 102556.
However, the Korean font seems to crash like Arabic on the current main build.
Based on log files, I found thousands of error report of reading "NanumGothic.ttf" Korean font file.
LogStreaming: Warning: Failed to read file '../../../Engine/Content/Slate/Fonts/../../Editor/Slate/Fonts/NanumGothic.ttf' error.
LogSlate: Warning: GetFontFace failed to load or process '../../../Engine/Content/Slate/Fonts/../../Editor/Slate/Fonts/NanumGothic.ttf' with face index 0
I hope to see a bugfix soon, and I can finally benefit from the community translation project.