On screen keyboard doesn't change with language

I am using Ubuntu 20.04. I have installed two languages English and Korean. I turned on On Screen Keyboard. But when I change language to Korean and use the on screen keyboard, it still shows English alphabet only, clicking buttons enters English characters only if using default input method ibus(With scim it has a new input Korean(Hangul) which inserts Korean Characters).However still On Screen Keyboard only shows English Characters. Am I missing any setting or is it a bug? Ideally, it should show korean characters when I switch to Korean.

P.S. Earlier I had posted about this bug in Pop OS and it was closed, So I tested with Ubuntu and same issue was present.

Also I tested with another language(Arabic) in Ubuntu, it works perfectly fine.