I've seen EU and US keys advertised out there. What is the difference between the two? Oh and and the JP key too. I heard the US and EU servers are at the same location?
  1. Do all of the keys allow play using the English language?
  2. Can I play on a server that is not of the same region (eg - EU/JP server using a US key)?
  3. Do I pay for subscription in the currency of the region key I activated (say, in the case of a US player who used a EU or JP key)?

Thanks in advance for the clarification!