All animals have their own unique language in which they communicate, though obviously it is not like the human language!
Many animals communicate through wavelengths and some rely upon unique sounds. For example, sheep communicate with each other through various sounds. Dogs communicate with each other through sound but they also mainly use body language. Whales communicate through high pitched sounds and elephants communicate through sound too. So generally it is a mixture of sounds and body language which make up animal languages and no two animals communicate in the same way. Some even use smells to communicate with each other too.
Many animals communicate through wavelengths and some rely upon unique sounds. For example, sheep communicate with each other through various sounds. Dogs communicate with each other through sound but they also mainly use body language. Whales communicate through high pitched sounds and elephants communicate through sound too. So generally it is a mixture of sounds and body language which make up animal languages and no two animals communicate in the same way. Some even use smells to communicate with each other too.