Not that we know of, no xD "Rosenkreuz" is a German word though, so it might appear here and there.
Also, the princes didn't come to greet you :) They were passing through, as it isn't an uncommon thing for them to actually be out of the palace for bussiness / missions. The greeting the MC would traditionally have to do was also skipped due to the State Dinner, since they were able to talk and give their regards to people there (off-screen xD).