[Natts]

No Finnish?
Well here are some ways to say hello:

-Hei!
-Moi!
-Terve!
-Heippa!
-Moido!
-Tere!
-Moro!

And in sindarin (elvish from LotR):
-Mae govannen (=well met)
-Suilaid (=greetings)
-Mára aurë (=hello)
-Le suilon (=I greet thee)