Difference between Auf Wiedersehen and Bye Bye

AUF WIEDERSEHEN vs BYE BYE: NOUN

Ciao, Good bye, Good by, Bye bye, Good day, Bye, So long, Goodby, Cheerio, Goodbye, Adieu, Adios, Sayonara, Au revoir, Arrivederci

Cheers, Au revoir, Arrivederci, Good by, Birdie, Godspeed, Incidentally, Goodbye, Hello, Good bye, Ciao, Later, Farewell, Adios, Adieu

Bon voyage, Bitte, Wunderbar, Auf, Meine, Danke, Farewell, Bye, Goodby, Goodbye, Adieu, Adios, Sayonara, Au revoir, Arrivederci

Howdy, Hiya, Hey, Greetings, Cheers, Au revoir, Arrivederci, Incidentally, Birdie, Later, Hello, Goodbye, Farewell, Adios, Adieu

Andrew Dickinson, Third Country Mandatory Rules In the Law Applicable to Contractual Obligations: So Long, Farewell, Auf Wiedersehen, Adieu?
Normally Monsieur Candie, I would say, auf wiedersehen.
Auf Wiedersehen Blackpool, wir fahren dorthin, wo es auf Sonnenschein eine Garantie gibt.
Auf Wiedersehen, Auf Wiedersehen und Auf Wiedersehen ist Wachstum.

The benefit will feature George Gobel in Bye, Bye, Birdie.
Bye bye millions of emails for new babies and birthdays!
Can he just get up now and say bye, bye?
Soon as there's emotions, bye bye passion and excitement.
If he threatens, tell him ok bye bye.
Bye bye, buy bonds, and lots of them!
Just once, before I say; Hasta la bye bye!
BYE BYE, BRA; w Rudy Simons, m Morton Zieve.
After using QOD City Bye Bye Frizz Shampoo, apply QOD City Bye Bye Frizz Conditioner on the ends of damp hair and massage it.
Eventually, Grundoon learns to say two things: "Bye" and "Bye bye.".