In korean language, every noun has a postpostion to use in a sentense.
It’s like this,
커피를 마신다.
‘커피’ is noun and ‘를’ is postposition, and there could be no space between two.
So when you make ‘커피’ page, unlinked backlink doesn’t work because most word in sentences like ‘커피에’ ‘커피는’ ‘커피의’ ‘커피로’ has postposition followed by noun ‘커피’.
I hope you understand what I mean because my english is so broken.
Can you add an option for korean that allow making link one word from two words even if there is no space between them?