There was actually a similar discussion about your first question not long ago, that myself and a couple other published authors had input on that you may find helpful, as well. Good luck!
https://forum.choiceofgames.com/t/profanity-allowed-in-games/
Edit to add: In “So, You’re Possessed!,” I would say the stats are purely literary, if you’re looking for an example? We didn’t have any battle stats that came into play. They have to do with your personality and connections to other characters that impact the story, choices, and overall tone.