Hello Yanina! Thanks for reaching out. We are eager to review packages in more languages and are open to packages with Spanish documentation and to conducting the peer-review process in Spanish, as well. This will be a first, however, so please have some patience as we experiment a some along the way, both in getting appropriate reviewers and considering if there are any language-specific review standards we should implement.
I’d suggest submitting one Spanish language package for us to review at first so we can figure out the process. When you submit, please make a note in the submission issue if (1) documentation is in a non-English language, and (2) if you’d prefer a Spanish review process.
One thing we should think about in this is whether to use R’s tools for language localization in messages/errors, too. We have one example in our collection of a package that does this: Rpolyhedra. It’s actually not too complicated, but the documentation for localization is a bit hard to follow. The msgtools package that provides some helpers but is no longer maintained.