What exactly did they say? I know from experience that staff are not allowed to swear in public server chats, however it depends on the situation. Mind giving more details?
Hey! If it was done publicly like server chat, in /msg, public discord, or forums then it’s not allowed and you can report If it was done via discord DMs then it’s not reportable as it’s off of McC
You can't really, Discord DM's are not related to MCC. The only exception to that is if a staff member would send severe threats (DDOS, Dox, etc) via in DM's.
Depending on the context of the situation, and those involved, I'd probably report the staff member in question. You do you, I guess ¯\_(ツ)_/¯