This seems pretty pointless since it sounds like they already have the infrastructure in place.

Posted this in the thread Bayohne started, but it really doesn't affect me much since I pretty much only play with NA players anyway. I've grouped up with random EU and JP players for things like behests and caravans, but I've never done any kind of significant content with them simply due to the language barrier.

With this announcement, I don't see many people playing outside of their home region just due to latency issues. I imagine there will be some people that can speak Japanese will play on JP servers, but this will be a tough call for linkshells comprised with multiple nationalities. They have to decide whether they want better network performance and want to play with people close to their own time zones, or whether they want to stick with the friends they've made.