Thanks @MMRIZE and @karsten13 !

I have tried following your instructions but it didn’t help.
I figured out it’s hidden in the modules css-file. I should have thought about that beforehand.
When I change the font as suggested by @MMRIZE to set as

font-family: 'Open Sans Condensed', 'Noto Sans KR';

It works now.

Thanks guys!
Case closed!