We don't see many Greek translations, much less of Gamecube games, these days.
Looks like you already did much of the hard stuff as well and now are left with the tedious. Have fun. Translating jokes is going to be an interesting one as I would hate to do much of that into languages I know.
Can't say it will be much use to me (go ancient greek and we might be able to talk) but there are invariably plenty of people that want to introduce games to their younger siblings or parents, or despite them "Engrish so well me" they will take their main language given a chance.