Research into non-human Great Ape language has generated a great deal of evidence suggesting that apes are capable of using sophisticated communication with humans and other apes.

Gorillas and chimpanzees have been taught to form signs in sign language, arrange physical tokens in specific sequences, and operate lexigrams (keyboards with symbols on them).

Analysis suggests that meaningful information is being conveyed by these behaviors, but it is disputed whether this phenomenon is truly language.

Sign language and computer keyboards are used in primate language research because non-human primates lack vocal cords and other human speech organs.

However, primates do possess the manual dexterity required for keyboard operation..

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