I definitely have the files, let me just double check it was creating players with Basque as their first nationality and if it was I’ll post them. I’m thinking with the troubles you’ve had then maybe I just didn’t look hard enough as that wasn’t the main focus of my test.
I was going to say Regions can be weird but saw you had tested without so it’s got to be hard coded. I did have a quick look and couldn’t see anything but it may be saved in my laptops browser history so will look at that shortly and let you know.
Your structure sounds awesome, I was thinking about something far more simple 😀.