This makes me wonder if they might be open to supporting a fan localization project. Hear me out: In the software I work on IRL, we code and program in English but have a localization code for every single component of the system. This allows our client in Quebec to manually translate it themselves to Quebecois French for their speakers, who can then choose what language they wish to default to (English or French) on a case by case basis.

Fan localization could then be crowd sourced, such that bilingual speakers of a language could translate the base game, NPC dialogue, and system and menu options. Obviously, voice cutscenes would have to be in a different language, but as someone who uses the NA English version of the game but Japanese voices, that might not be a deal breaker for many people. Even people like me whose second language is Spanish and are at intermediate fluency could assist with that project.

Then, the localization patch could be installed by users on the fly, instantly translating the game to the selected language.

SE would have to provide the framework for this - a place to upload a language localization pack, a means of translating the dialogue in the game (read: the scripts and matched localization codes), and a means of downloading the selected language - but a lot of that work is already done in the game as it is since multiple languages are supported already. And this would allow for far, far more languages than just Spanish! I know there has been a request for Italian localization. Spanish and Portuguese might not be huge enough markets to hire a professional localization team, but crowd sourcing the grunt work would let the fan translated localizations be a labor of love. It'd also have to come with a disclaimer that "hey this is not the official translation in your language" as well as a means of submitting error corrections when they come across something that is obviously wrong and was done by a 2nd year DuoLingo student.

(If I remember correctly, French and German are required to be able to sell games in the EU, but Spanish and Italian are not, so take that up with the governing body of the EU if you want to enact a forced change.)