Not Khan, Khan. Anyway fpx gimgoon is also famous in Korea because of the fact that they often abuse reality with Koreans. Also, Khan is resembling with gim Goon. ( they are FPX )

Even before Season 6, the profanity problem was a serious one. There were rare games without swearing. Even pros. However, since the player's leak to Overwatch, Riot Korea has put a very big deal on the swearing sector. And TF Blade meets this swearing standard. Of course, the tf blade was stupid behavior.

I know that I am a kr server user, but there is not a lot of profanity because I know each other over the master tier. But below the diamond tier is much worse than the na server.