The campaign to localize the Digimon games – dubbed Operation Decode – has been going on for over a year now. Recently, their petition hit just a little above 45,300. getting closer to its 50k milestone. Previously, Isshak Gravi, Namco Bandai Games Europe’s Community Manager, mentioned in a tweet that NB may start considering localizing Digimon World Re: Digitize Decode for 3DS and Digimon Cybersleuth for Vita based on the petition’s performance.
@ianuarius90 make the petition reach 50k fans at least, then we can maybe start considering it.
— Isshak Gravi (@Isshak_Gravi)
Haseo-san, the head of the localization campaign, later made it clear that this does not mean that once they hit 50k the game will be localized. Rather, once it hits 50k (and more), discussions about the game could be brought up. You can read his exact post in detail here.
Digimon World Re: Digitize Decode is already out in Japan, with Cybersleuth coming out in Japan in 2015. The campaign has also branched out to other places, such as the Namco Bandai N.American/ EU forums. Links to those, and other social media pages they run are all provided in the official Operation Decode page.