Tales of Xillia is more dated than the recent Tales of Graces F game that just came out this month. In fact it has been out for around a year now, and finally we see signs that it might be coming to the English market. Just a week ago, Namco Bandai filed a trademark for Tales of Xillia in Europe, and now it has done the same in the United States.
We're all hopeful it means the game will get a localization, after all not many titles in the lineup make it outside Japan. However, it's best not to let those hopes run too high until Namco Bandai makes an official statement.