The F word would all of a sudden lose it's punch. Puck the pucking puckers.

What about the existing word "puck", as in hockey puck?

"copy" would also become ambiguous with coffee :)

i was thinking about this for a long time

but some sort of indicator, maybe an accent or symbol to indicate the F sound

this would radically expand the number of pronouncable words in Korean.

with the goal being able to describe phonetically as accurately as possible any spoke word in human history.

Scandinavian languages need not apply. There should be no alphabet that describes the sound of spitting.