Board Thread:Questions and Answers/@comment-97.102.164.251-20160813155611/@comment-24356739-20160813161115

1) You game data is stored along with your DMM account (if you started playing in browser instead of mobile app), as long as you can access your DMM account in the DMM website (where you will need to do the proxy steps to bypass region lock), you can play with your account in any PC.

2) You can switch to your English account to proceed with your payment for Credit/Debit Card, iirc. For Paypal, I'm not too sure but it seems that you can only go through the process with Japanese version. *will need other's confirmation on this matter*