According to Riot, you can use strong language in your games as long as it isn't derogatory
PROOF: http://prntscr.com/dvp0g8
Is that really how it works though? For example, according to this, if I say "My fucking ultimate had 0.1 seconds remaining", it is not bannable right?
I don't understand how that can work though, since the Instant Feedback System is an automated system that detects offensive language directed to other players.
Any clarification?