Hand Gestures -- a well meant gesture might just mean something other than what you intended!
HAND JIVE poster infographic shoes some more hand signals adopted by Hearing cultures in America but are not understood to mean the same thing in other areas; this warns you where to avoid them as it could be some serious trouble for ya! *Not "Sign Language" just gestures to take note of :)
Around the World in 18 Gestures
Mudra -symbolic or ritual gesture in Hinduism and Buddhism. While some mudrās involve the entire body, most are performed with the hands and fingers.