Hi, why did you switch name and alt_name around here? https://www.openstreetmap.org/way/54055069/history 

The way I remember it, "BOTSCHAFT DER REGENWÄLDER" is what the signs at the doors of this building say. The on-the-ground rule means that this is what should be in the tag "name". I realize that "Regenwaldhaus" is what everyone calls it, but unless the signage has changed, I would switch it around again.