Editor is using wrong localization

I didn’t change the localization in BP or C++.

I didn’t use the console at all, also not in code.

I’m not using the Dashboard. Everything’s default. The only culture is English. I set it as the native culture now but to no avail.

The Epic Launcher also shows English.

For some reason, the editor is switching to Japanese (or whatever that is). I even uninstalled it on Windows but still the same problem. I don’t understand…