You can say "good night" when it is your day time, if you are talking to a person who is in a country where it is night time. When it is day time in Ireland, it is night time in Australia and New Zealand, and other places.
In Telugu, to say "good night" you would say "శుభరాత్రి" (shubharatri).
To say good night in Tagalog, you can say "Magandang gabi."
good night in samoa
A response when someone says good night is to say good night to you too.
You can say "good night" in Malayalam as "shubharathri."
You can (try to) say Yá'át'ééh hiiłchi'į'
To say "good night dad" in French, say Bonne nuit, papa.
"Have a good trip!" English is the official language of Australia.
In Afghanistan, you can say "Shab bekheir" to wish someone good night.
"Kammagar" is how you say good night in Chuukese.
I am a creole and i spell it like this "gud nite" oh.