Pentiment is a very, very good videogame, and one of the most interesting things Obsidian's put out this decade (though I liked Avowed quite a lot). Now, we're sufficiently far enough past its release that people like director Josh Sawyer—a name you'll recognise from Fallout: New Vegas, Pillars of Eternity, and an all-timer Dolly Parton cover—are out and about giving GDC talks about what it was like making it. Sweary, it turns out.
It wasn't the devs cursing, mind you, it was the characters, and it was 100% unintentional.