the commonest way to say goodbye is "au revoir"
The main language in Argentina is Spanish so the way you would say "goodbye" is "adios."
Bluntly and honestly.
Cheerio is a popular way to say goodbye in London. Another popular way of saying goodbye is toddlerhood or ta-ta.
See you later or farwell for now
The best way to say goodbye is to give someone a smile, embrace and hug him and tell him nice things.
Sayonara is the most common way.
chalyse
さようなら /sa you na ra/ is standard way to say 'goodbye' in Japanese.Read more at: What_are_all_ways_to_say_farewell_in_Japanese
I know in England it is a nice way to say goodbye.
Going My Way - 1962 Don't Forget to Say Goodbye - 1.17 was released on: USA: 23 January 1963
In Brazil, the most common way to say goodbye is "Tchau." Another informal way to say goodbye is "Adeus." In more formal situations, you can say "Até logo" (See you later) or "Até breve" (See you soon).