Yes and No

American Sign Language:
Yes http://commtechlab.msu.edu/sites/aslweb/Y/W4545.htm
No http://commtechlab.msu.edu/sites/aslweb/N/W2506.htm

English:
yes
no

French:
oui
non

Italian:
sì
no

Spanish:
sí
no

Swahili:
ndiyo
hapana