formal:
Auf Wiedersehen!
Auf Wiederhören! (telephone only)
Lebe wohl! (When you're not going to see them again)
informal:
Tschüss!
Ciao!
Tschau!
Tschö!
Ade!
Servus!
"Hallo und auf Wiedersehen"
Hallo, Danke, Auf Wiedersehen
"Goodbye to summer!" in English is Addio all'estate! in Italian.
"Goodbye, my lover!" in English is Arrivederci, amante mio! in Italian.
goodbye
Hello-Hallo Goodbye-Auf Wiedersehen School bus-Schulbus Library - Bibliothek
"Hello" translates to "bonjour" and "goodbye" translates to "au revoir" in French.
Ciao belisima
Adios.
"German" in English is tedesco in Italian.
Au revoir! in French is "Goodbye!" in English.
Della in German is "bright" or "noble" in English.