Rejoice ! The Linguist extension is now compatible with beta 9 and 10, thanks to the sponsorship of Glowingblue!
It still works exactly the same as before, and has been moved to FriendsOfFlarum.
Now after editing translations, Linguist will offer you the opportunity to clear the forum cache. For performance reasons, Linguist won't attempt to clear the cache by itself.
Translations for French and German have been removed (see this discussion for the reasons), language pack maintainers can copy them from the previous release to integrate them into their packs.
Updating from Flagrow
This extension replaces Flagrow Linguist.
To upgrade from the old extension to the new one:
composer require fof/linguist
Composer should let you know that
flagrow/linguist has been automatically removed.
Enable the new extension in the admin panel.
Your existing translations will be migrated to FoF Linguist automatically.
Edit a translation or clear the cache to apply the existing translations to the forum.