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?
Exactly, everyone has so much PTSD. Everyone you have ever known and cared about is already dead and your fighting for your life, is no way to go through a dungeon Carl.
Worth a reminder that Matt considers himself a horror writer, not a fantasy writer