In Australian English, "goodnight" is typically said as "goodnight" or "night." Australians may also use the informal slang term "nighty night" or "night night" in casual settings. The pronunciation of "goodnight" in Australian English is similar to British English, with a clear "g" sound at the beginning and a slight emphasis on the "igh" diphthong.
Subho ratri............But that is beyond formal.....We just say GoodNight in daily conversation.
Aloha po
You can say "tenha uma boa noite".
You would say, "Good night,I love you".
晚安 Wǎn'ān
You can say "lafi" to say goodnight in Mandinka.
In Berber, you can say "tanemirt" to say goodnight.
"Goodnight".
goodnight
goodnight!
In Fulani, you can say "Jaama wolof" to say goodnight.
In Pangasinan, you can say "napagtolak" to mean goodnight.
shab bekheyr
In Polish, you say "dobranoc" to wish someone goodnight.
In British English, you can say "goodnight" or "night" as a shorter version.
In Sondhi, you can say "ດີ່ນກັນ" (dien kan) to say goodnight.
goodnight is "bonne nuit" in France.