At the Japan Expo that just wrapped in Paris - no, this isn't mistyped - Dragon Quest maestro Yuji Horii spoke with the assembled press. Among more mundane matters, Horii intimated that the recent 3DS remakes of Dragon Quest VII and VIII would be released "in French," a move that apparently caused his translator some consternation at the time.
This was clearly something that Horii simply wanted to leak for fun; there's no release date, no other particulars, and so on. However, this is good news for all Dragon Quest fans outside of Japan. Someone like Yuji Horii wouldn't make this comment if it weren't true, and if there is bound to be a French localization, there's zero chance that other languages are not on the table, especially English.
Source:
Siliconera