Body language is a form of non-verbal communication that involves physical movements, facial expressions, and gestures. ENGLISH is the most widely spoken language in the world, and is used to communicate with people from different cultures. NOD is a gesture used to indicate agreement or understanding, usually by moving the head up and down. TATTOO is a form of body art that involves permanently marking the skin with ink. Gestures are physical movements used to express ideas or feelings, such as waving or pointing.