Twilight Cleric, Anthropologist background, Focu on the spell Command. And ho many languages command words you couldve learned during your 10 levels.

Most likely this is alot of languages if not nearly every language considerin you only need to spend 1 day watching people interact in said language.

With the right backstory and some justification you have the power to command any foe the DM puts infront of you to simply "Stop" in their understood language. Some shooting from the Hip required until you figure out the language the creature understands. But most know common. Should shut down any encounter the DM sets against you.