Pretty simple: what are your conlangs' greetings and farewells?
The latter can be "good night" or something like that.
In Isyan, we have the neutral: (said to anyone of any rank)
Mysi /'mi:si/— hi, hello, bye
Fona kymar /fo'nα: ki'mαr/— see you soon/later
Ditrov /di'tro:v/— good morning, hello
Tilloi /til'loj/— good afternoon/evening, hello (said at noon-evening)
Nödas /nœ'dα:s/— hello (said at night)
Zeya /zε'jα:/— bye (neutral), hey(inf.)
Sey /sej/— bye (inf.)
Seye /se'je:/— goodbye, farewell (when next encounter isn't expected to be soon)
More of mine will be up later In the meantime, what are yours?