Thank you for your kind reply.
A few days ago, I installed version 2.2.1.4 (
https://github.com/LibreCAD/LibreCAD/releases/tag/v2.2.1.4). Following your advice, I changed the GUI language setting to Korean and rebooted, but the GUI still displays in English.

I suspected this might be because it was different from the latest version you mentioned, so I uninstalled that version and installed 2.2.1-latest instead. However, this time the newly installed LibreCAD does not run at all.

Windows security shows a message that Smart App Control has blocked the app, judging it as unsafe and from an unknown publisher.
P.S.
1. My PC’s OS is Windows 11.
2. The warning screen from Smart App Control cannot be captured, so I took a photo and uploaded it.