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.
Hello-Hallo Goodbye-Auf Wiedersehen School bus-Schulbus Library - Bibliothek
goodbye
Adios.
Ciao belisima
"German" in English is tedesco in Italian.
Au revoir! in French is "Goodbye!" in English.
Della in German is "bright" or "noble" in English.
Hello and Goodbye World geography can be translated as Hallo und auf Wiedersehen Weltgeographie.