Do dolphins have a language?[意思

Do dolphins have a language?[意思 language do not just have different sounds 什么意思 Do you have a choice language ____to study How do dolphins sleep? Do you like dolphins have language in common 还是have a language in common dolphins什么意思 dolphins的意思? Then and only then do these people have a LANGUAGE.英译汉! How long do dolphins sleep? what do you think of arbitrariness?Do animals have language? Do you have a soccer ball?意思