Kwa heri or Kwa herini (to more than one person)
Adios
antio
Au revoir
Adios - Goodbye
Tot ziens!
Hallo Totsiens
adios amigos
You simply say "farvel", the danish equivalent of "farewell"...
We say "chao" or "hasta luego" or " no vemos manana" or "chabelas".
You say memorize in Swahili like this: kukariri
You can say "Nakukosa" in Swahili to mean "I miss you."
The Swahili word is 'Na'