It's fine, don't apologize. So much history has been lost since what was my era and this one, I'm not surprised they avoid using the word Sith. Either they are ashamed of their own history or they don't want others to know where they originated in order to try and avoid anyone discovering where their weaknesses lie.
You're not a Jedi but you fought a Sith and survived? That's impressive. This Kylo Ren, what do you know about him that isn't available to the rest of us?