The editor that Larian is using to make D:OS will be released with the game, so I would guess you should be able to use the dialog editor to translate the text (or create new mods in other languages).
Actually, in the kickstarter comments someone asked about the possibility of crowd sourcing an Italian translation if no distributor could be found, which Larian was open to the possibility of. If there is no official Spanish translation, there may at least be some support to help make fan made translations easier (and hopefully faster than 10 years
).
