Country settings

I really appreciate you adding Israel’s setting for ISBNs!

I wonder if it would be useful for people, (it certainly would be for me), to have in the drop down, different countries. For example I create books for USA, UK and Israel. Rather than looking up the conventions for ISBN for each country, if that was built into the software, then if I need to create an ISBN for say, France, I don’t need to look it up!