Wow Ilanthar, this is epic! I have no idea why I haven't commented here before, it's extremely cool! I love the colors and shapes, and the detail level and size is very, very impressive The cartouche is gorgeous too.

If I'd have any criticism to give, it'd be that the mountain labels seem to be identical to nation labels except for the slightly smaller size, which is a little confusing to someone with rusty french And many of your sea labels could curve to harmonize with the land shapes more, I think.