At Interlaken, had a quick changeover (6 mins!) to take the 2 hour ride to Lucerne again just basking in the glory of mountains & waterfalls on the most perfect summer day. I think we had gone from German to French back to German through this trip & I kept trying to greet & thank the ticket checkers in the right langauge. "Danke!","Bonjour!", "Merci!" It was a fun little game for myself.