if surface=Gras_Laub can be blindly retagged to surface=grass I would add it to list of such values


And for cleanup: see https://wiki.openstreetmap.org/wiki/Mechanical_Edits/Mateusz_Konieczny_-_bot_account/fixing_malformed_surface_tags (new group of tags to be fixed is just getting approved)

if you know about other such values, then I would be happy to add them to the next group