Not sure why the post by user "norlywtf" was flagged, I'm having the same issue: on macOS Catalina the UI comes up in Russian. I can read Russian, so it's not such a huge issue for me, but for someone who doesn't it'll be very non-trivial to find where to set the UI language because it's a tiny gray gear icon on a gray background, an the program does not use the Mac menus, nor does it respond to Cmd+, shortcut.

Interestingly, one of the most annoying UI aspects of the program, the lack of label capitalization, is not present in the Russian translation. Everything is properly capitalized there.