Pal Xp and the other series of the game needs to be extremely popular enough for the original creators to notice before considering a translation of the game into other languages. For example, If a game isn't popular enough or noticed, no one would know the game exist nor have an interest in it. If no one wants to play it, the creators would be wasting their effort on translating a game that no one notices thus creating a loss on their budget and time. On the other hand, if a particular game existed and grabbed billions of people's attention from around the world, then its definitely going to get translated. This also has something to do with demand, beneficial profit, and majority interest.
As for the progression of the translations, remember its a small group of fans using their own free time to translate the game. It doesn't get done in an instant because everyone has things in their life that they need to do. All it takes is patience
