You should probably have left eligibility as a boolean; casting to int might imply something illegal.

Yeah, but if I try to run my microwave at the same time it trips the breaker.

When I started reading the book, the made-up words irritated me at first, but once I'd read a little further and started to sort out their meanings I took a step back to consider what effect all these unknown terms had on my experience with the book.

Some of the unknown words described concepts that were new to me, others represented things that I'm totally familiar with. Removing my ability (initially, anyway) to distinguish the two dramatically intensified both the alien and the mundane aspects of Arbre. It was a little bit like reading sci-fi for the first time - as I gradually absorbed these new words I kept getting surprised both by the ways this futuristic world was the same as mine, and by how it was different.

The initial frustration totally paid off for me.