there was an unofficial Spanish localisation underway, but I'm not too sure if it's still being developed. The game has the ability to import translations, and I'm more than happy to offer support to anyone that wants to have a go at localising! :)
You'll need all the translation strings exported, and a full translation written, though. And as of now, that hasn't been done. I can upload the translation strings online if anyone would like to give it a go? :
