The German Supreme Courts are also moving to Mastodon.
The German government already has an extensive official Mastodon presence, via social.bund.de.
Today the German Surpreme Courts (subdivided into 5 branches) released a press release that they will know also be using Mastodon.
Press release (in German only): https://www.bundesarbeitsgericht.de/en/presse/nr-14-23/