I'm not sure if they're Chinese, Japanese, Korean, etc. but, the context menu that displays when right-click dragging an item to a non-encrypted destination, shows characters in a foreign language (see screenshot 1). Clicking on the item causes a prompt asking if I'm sure that I'd like to encrypt the file (see screenshot 2). I don't find any sort of language settings in the preferences, and my OS language is not set to anything of the sort. This only happens with Boxcryptor and not with any other apps.
Screenshot 1:
https://imgur.com/a/HzliS
Screenshot 2:
https://imgur.com/a/uPzZA