
Hi Johannes, welcome back — and thanks again for your previous contributions! Just a quick note regarding trail names: unofficial or locally-used names shouldn’t be added to the name tag in OSM. Instead, I’ve been moving them to loc_name or occasionally description, where appropriate. Using name for these is considered tagging for the renderer. I’ve included a couple of helpful links below for reference. Let me know if you have any questions!

https://community.openstreetmap.org/t/how-to-appropriately-label-names-for-unsigned-or-unofficial-outdoor-trails/106735/3 
https://wiki.openstreetmap.org/wiki/Tagging_for_the_renderer 