You can probably understand all or most of the words that Antoine uses in this book, but the real challenging is sticking with him without letting your mind wander.
We can't lie: there's not really much of a plot to this book. It's basically a guy wandering around a town and thinking about the nature of existence. Because of that, it can be really, really tough to pay attention.
But if you do, you might just be rewarded with the truth about existence.