I just started Dungeon Crawler Carl. In it he fights a Spanish speaking boss. The Spanish is not translated (so far) and if you can read it, it really changes the mood and impact of the entire scene.
Are there any other books that hide significant plot points behind the use of foreign language?
Hell, I’m still in book 3 and the whole thing is dark but approached with levity by the absurdity and the degree to which the system AI is keeping it showy.
I’m not one for spoilers so I’ll just say that the seriousness of the situation comes into focus during The Inevitable Ruin. It’s still silly but bad things happen and characters respond appropriately!