Honestly, the region shouldn't matter. If you want you could add a little notice that it's English-only for now, but there's absolutely no reason to limit this

Honestly, the region shouldn't matter. If you want you could add a little notice that it's English-only for now, but there's absolutely no reason to limit this to a particular country. It's a totally free service and it doesn't involve complicated region-specific licensing agreements, so where someone lives quite simply does not matter.