sign language

deafness

is the only language where you can have a conversation underwater.

is the only language that travels at the speed of light. All other languages travel at the speed of sound.

is all fine and good if you're not holding anything, but if you are, it's like trying to talk with your mouth full.

is just really complicated hacks to the game of charades.

is technically the least spoken language in the world.

is useful for the deaf but vital to the Italians.

Sign language is useful for the deaf but vital to the Italians.