Unlike the Wii, Wii U and PC version of Dragon Quest X, the 3DS version is using the cloud to stream the game to the players. This means you’re playing the game on a server instead of your console. Still, there are some problems with this: when there is a large number of players playing the game, the streaming servers can overload, making it impossible to play.
Square-Enix already halted the shipments of the games and removed it from the Japanese eShop until the streaming issues are fixed, so this is quite a bad surprise for those who already bought the game.
Like always, there is no word about the game’s localization on any of its versions, however, it seems that Square-Enix is already interested, mostly for the Dragon Quest series (but not this title in particular).