Good night.

American Sign Language:
Good http://commtechlab.msu.edu/sites/aslweb/G/W1475.htm
night http://commtechlab.msu.edu/sites/aslweb/N/W2500.htm

English:
Good night.

French:
Bonne nuit.

Italian:
Buona notte.

Spanish:
Buenas noches.

Swahili:
Ulale salama.