People say goodbye as life is very uncertain, the two may not see each other next day as one could be dead.
People in Canada speak English, so I imagine they would say 'bye'
masalama
selika
uhi
adios
see you later alligator
Most people speak English in Dublin, so you could just say goodbye. If you wanted to say it in Irish, you would say Slán, which is pronounced slawn.
I Will Say Goodbye was created in 1980.
Goodbye
Goodbye
goodbye
Goodbye