The UK has GDS Transport, which can only be used on gov.uk websites, not even internal UK government websites.

https://design-system.service.gov.uk/styles/typography/

The British government may be an omnishambles, but their websites are remarkably clear and readable, specially for an aging population with worsening eyesight.

Building an atlas of these for every country in the world seems like a fun project.

die Bundesregierung has their own fonts too.

https://styleguide.bundesregierung.de/sg-de/basiselemente/sc...