I see Cologne has named a tram after the local Kölsch dialect band Bläck Fööss. Amazed to see the band is still going. In my gap year 40+ years ago I spent a couple of months trying to sell magazine subscriptions door to door between Cologne and Düsseldorf. The two guys who ran the sales team played Bläck Fööss tapes all day long every day in their VW van.
Cologne’s carnival and trams – also in Bonn – Urban Transport Magazine (urban-transport-magazine.com)
As you can see, the trams are adorned with words from the lyrics, as well as with images of the eponymous Black Feet.