weeklyOSM, the multilingual edition of the ‘Wochennotiz’, has been around for exactly 10 years.
https://wiki.openstreetmap.org/wiki/WeeklyOSM#Some_Milestones
One can read some background information in an interview with the founders, published 2015-01-23
https://weeklyosm.eu/overcoming-language-barriers-with-openstreetmap