Aloha po
Subho ratri............But that is beyond formal.....We just say GoodNight in daily conversation.
You can say "tenha uma boa noite".
aloha po or aloha aumoe (if going to bed) [aloha po] [aloha ow-mo-ay]
Kakalina is Kathy in Hawaiian
You would say, "Good night,I love you".
In Berber, you can say "tanemirt" to say goodnight.
You can say "lafi" to say goodnight in Mandinka.
goodnight
goodnight!
"Goodnight".
In Fulani, you can say "Jaama wolof" to say goodnight.
In Pangasinan, you can say "napagtolak" to mean goodnight.
In British English, you can say "goodnight" or "night" as a shorter version.
shab bekheyr
In Polish, you say "dobranoc" to wish someone goodnight.
In Sondhi, you can say "ດີ່ນກັນ" (dien kan) to say goodnight.
goodnight is "bonne nuit" in France.