Kun and Chan are Japanese yea.
Korean has things like -Yo which goes at the end of a verb.
Similar things for nouns, different versions of them for different occasions, and sometimes they change the previous letters.
Think theres some others too, been a while since I was trying to teach my self korean xD but I think there's some for the ends of sentences as well.
One example "Ha" means "Do" but if you add the honorific "yo", which you would do unless talking to a close friend, it becomes "Haeyo" but "Sa" which means buy just becomes "Sayo"