Language is a way of exchanging information between two entities, whether by means of sound, electrical pulses, chemicals or light.

Language in common usage usually refers to either a way of communication by speech between two sentients, or a programming language.

Spoken language is considered an important part of being human, but many different languages exist in the terran sphere, and even those that are nominally the same may be critically different. Important languages spoken in the Terran Sphere include:

Notable languages used outside the Terran Sphere