User blog comment:Akrie/July 16th Events & Updates~!/@comment-25968376-20150717082119/@comment-25968376-20150717152939

Well of course they want as many people to play as possible, so they need to include an English option. And the payment with USD is just because it's a rule of the App Store/Google Play (for me it still says USD in the menu but if I would actually buy crystals, it would ask me to confirm with Swedish kronor). That doesn't mean it's aimed towards Americans, though. Otherwise we'd see something for the 4th of July and less Bingsoo, Sakura or whatever :P