Firefox OS Privacy Notices has already been localized into [8 languages](https://github.com/mozilla/legal-docs/tree/master/firefox_os_privacy_notice). According to a [bug comment](https://bugzilla.mozilla.org/show_bug.cgi?id=963816#c30), legal translations are done by a vendor, and the community reviews the final work.

The problem here is adding a new language requires a lang file in the SVN repo in addition to a translated markdown file on GitHub. It would be solved in a separate bug.