We have used a local high school Spanish teacher for translation services for many things. We use the built in translator in word for a bulk of the translation and then have the Spanish teacher clean it up from there. We contract the service by the hour. You could contact a local high school, college or a tutor and probably find someone who would be willing to freelance and do translations.
Relius does provide their website, app and VRU in Spanish, but we have not seen it with their plan document software.