It would be cool to expand the languages, but it would also be a rather big undertaking as well. The game is nearly a decade old with 5 full length RPGs worth of dialogue, quest logs, item descriptions, etc. That's not something that can just quickly be translated. Then there's the added costs of doing all the voice work over again for the new language. And depending on where you are trying to get people from, perhaps even new datacenters at some point. It's likely not something they can casually do I'd assume.