The new magic word #mentor will be soon deployed to wikis, allowing users to retrieve raw mentor's name from the database. Just as special pages, magic words can be localized into different languages. The only issue is it is not currently possible to do it via translatewiki, but via a direct commit to the software (same as for special pages).
Contact all ambassadors, and ask them whether the magic word #mentor should be localized for their wikis. Upload a commit, providing GrowthExperiments.i18n.magic.php with the translations.
To be filled by the ambassadors: