I use the English and Korean input sources on my Macbook.
For some reason or other, the English one has a U.S. flag as its icon, but the Korean one has a completely different icon — the letter "⬜" instead of the Korean flag. This really bugs me.
I've tried using the program Ukelele to make my own input source with the Korean flag as its icon, but apparently Ukelele doesn't support the Korean input method.
So is there a way to edit a preexisting input source? I'm looking to change the icon of the default Korean input source on the OS X.
EDIT: Apparently StackExchange thinks all Koreans must be spammers. The letter "⬜" (which has been replaced) looks like this: https://ko.wikipedia.org/wiki/%ED%95%9C