There's a couple games from the Fire Emblem franchise that a LOT of people want localized, especially after Shadows of Valentia launched and was well received (to my knowledge).
To elaborate:
Fire Emblems 1-6 and 12 were not localized. Aside from 5, all of those games have decent-to-good fan translations.
Fire Emblem 5 (also known as Thracia 776) has two fan translations: one that translates most of the game, but has questionable quality, and another translation that translates the UI and menus very well, but doesn't touch anything else (like dialogue).
The guy who directed FE 1-5 left IntSys after FE5, and created his own, similar, series. These are known as the "Saga" games: Tear Ring Saga, Berwick Saga, and Vestaria Saga, none of which has an English localization. There's a fan translation for TRS I think, and it's been announced that Vestaria Saga will get a localization in due time, but I don't think Berwick Saga has any translation.
Obviously, I'd like official localizations of all of those games. But Thracia 776 and Berwick Saga needsa localizations the most.