Good afternoon.

American Sign Language:
Good http://commtechlab.msu.edu/sites/aslweb/G/W1475.htm
Afternoon http://commtechlab.msu.edu/sites/aslweb/A/W0082.htm

English:
Good afternoon.

French:
Bon après-midi.

Italian:
Buon pomeriggio.

Spanish:
Buenas tardes.

Swahili:
Masalkheri.