Official announcement?
No.

But through intelligent research, I've concluded that localization is more than likely deep within the realm of possibility and probability.

How? I viewed the trademark, which can be found at http://tarr.uspto.gov/

I searched and found the trademark for Tales of Graces (http://tarr.uspto.gov/servlet/tarr?re gser=serial&entry=77689925), and reviewed it. One thing that caught my eye was the Filing Basis, which shows 1(b).

Now legal definition of a 1b filing basis states "You'll note it's a 1B. When your basis for filing is 1B it means you haven't used it in commerce yet -- that would be 1A, Use in Commerce -- but you intend to:

Intent to Use

Check this box if actual use of the mark in commerce that the U.S. Congress can regulate (i.e., interstate commerce, territorial commerce, or commerce between the United States and a foreign country) has not yet occurred, but instead there is simply a bona fide (good faith) intention to use the mark in commerce at a later time after filing of this application. The intention to use may be by the applicant, the applicant's related company, or the licensee of the applicant. You may file under more than one basis, but you may not file an application based on both use in commerce under §1(a) and a bona fide intention to use a mark in commerce under §1(b) for the identical goods and or services (e.g., you cannot list "shirts" under Section 1(b) and Section 1(a), but you could list "shirts" under Section 1(b) and "pants" under Section 1(a)). NOTE: If filing under this basis, you will be required to submit a demonstration of use (i.e., submission of a form with an additional fee and a specimen (sample) of said use) later in the prosecution process of the application.

Use in Commerce

Choose this basis if actually already using the mark in commerce that the U.S. Congress may regulate (i.e., interstate commerce, territorial commerce, or commerce between the United States and a foreign country) in connection with the goods and/or services identified in the application. You must be able to provide the date of first use anywhere and the date of use in commerce that the U.S. Congress may regulate, and a specimen (sample) of said use. Use may be by the applicant, the applicant's related company, or a licensee of the applicant. You may file under more than one basis, but you may not file an application based on both use in commerce under §1(a) and a bona fide intention to use a mark in commerce under §1(b) for the identical goods and or services (e.g., you cannot list "shirts" under Section 1(b) and Section 1(a), but you could list "shirts" under Section 1(b) and "pants" under Section 1(a)). "

So in a nutshell, Graces hasn't been localized yet, but they plan on localization.
I've never been so hyped up about a Tales Game since Symphonia 6 years ago, looking at it in a Nintendo Power Magazine. And the TGS just made it a deal.
Man, TGS makes E3 look like the joke that it is, but I digress.

Localization very, very possible, but still keep our fingers crossed, Namco, being the owner of the Trademark, they can choose to change their mind--for any reason, or no reason at all, But being a huge Namco fan, I pray they don't.