Europe has about 50 different countries, so there are a large amount of very different languages spoke in Europe. There are therefore many ways of saying "Goodbye". It depends on where you are and what language you are speaking. Here are just 10 at random:
Danish: Farvel
Dutch: Vaarwel
French: Au Revoir
Polish: Do Widzenia
Irish: Slán
Greek: Antio
German: Auf Wiedersehen
Russian: Do Svidaniya
Estonian: Hüvasti
Albanian: Lamtumirë
There is no such language as "European". Europe consists of many countries and there are many languages in Europe and there are many different ways of saying "Welcome" in those languages.
I Will Say Goodbye was created in 1980.
goodbye
Goodbye
Goodbye
Goodbye
you say goodbye in French
Goodbye.
Say Goodbye to Hollywood was created in 1975.
How Can I Help You Say Goodbye was created in 1993.
Anyone Can Say Goodbye was created in 2006.
To Say Goodbye was created on 2009-07-27.
I Will Not Say Goodbye was created on 2010-06-28.