In conjunction with Level 5's recently filed trademark, Ni No Kuni's English title has now been revealed to the world and, surprisingly enough, the English title is nearly identical to its Japanese counterpart.
The US trademark stated that the title will be known as The Wrath of the White Witch in English. Compared to the original translation, The Queen of Sacred White Ash, it's not too far-fetched. Unfortunately, there doesn't seem to be a corresponding US trademark for the Nintendo DS title, "The Jet Black Wizard".
No definite launch date as of yet, but Level-5 president Akihiro Hino said that The Wrath of the White Witch will be released outside of Japan in early 2012.