You know how in fantasy worlds, its all english? Kinda breaks the immersion a bit. I wanna find something where they make it as realistic as possible, and make everything in a fictional language, basically using subtitles as the main way to understand the plot.
If you count text boxes, not having anybody speaking the language, and having to piece together the language based off of context clues and guessing if need be, Chants of Sennaar might work.
Other than something like that, I personally cannot think of any other work that does what you describe.