I'm migrating http://sn.jonkman.ca/ to a new instance, likely httpS://gs.jonkman.ca/ in a month or two, and recreating the groups on the new instance, then decommissioning the old one. I can direct people to join the https://gnusocial.de/group/526/id group instead of recreating the current !OSM group.
Perhaps https://gnusocial.de/group/526/id is for German language discussion, http://sn.jonkman.ca/group/osm for English language. !OSM