[mark=#FFFF00]Talking to animals[/mark]
If these five properties of human language make it such a unique
communication system, quite different from the communication
systems of other creatures, then it would seem extremely unlikely
that other creatures would be able to understand it. Some
humans, however, do not behave as if this is the case. There is,
after all, a lot of spoken language directed by humans to animals,
apparently under the impression that the animal follows what is
being said.
If it seems difficult to conceive of animals understanding human
language, then it appears to be even less likely that an animal
would be capable of producing human language. After all, we do
not generally observe animals of one species learning to produce
the signals of another species.
So many experiments have been conducted in order to teach
chimpanzees human language, sign language, or even a system of
communication (using plastic shapes), but the results were so
poor, proving that even the most close creatures to us are unable
to acquire or learn our language