Elephants communicate with each other:
http://video.nationalgeographic.com/video/animals/mammals-animals/elephants/elephant-gestures-play/
I also have met people in Madhya Pradesh, Karnataka and Kerala and Tamilnadu in India and even in Indonesia, who can/ could talk to elephants in their own but different language/s and understand each other. Any how those people who know the language of animals are not Harvard or MIT or Oxford or Cambridge or IIT or IIM graduate or any top University graduate world over, or Ph. D. like me, but they are not less literate in their own domain is what I feel. They are Doctorate in their own field, if we recognize them, reward them, record how they do it, then learn from them, then only humanity will be benefited otherwise soon it will be a lost art or science. After, 50 years we'll again reinvent this wheel......thanks to humanity...for not respecting each other and spent time in war, hatred, egoism, egotism, and corruption. Long live humanity. Aum Shanti: This video proves that, but, this is visual language that we understand. I'm talking about the "Mahut" and "Care Takers" who can talk to Elephants and understand their suffereing, help them when ever they are in need....etc. I've seen it. Elephant telling it has stomach ache and then care taker providing it the needed medicines...etc...Dr. Ashish Manohar Urkude, India..ashish.urkude@gmail.com 

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thank you for sharing this  with all of us.in the wild  .the  elephant  gaurds his space ,its  and the pack,,including  baby's, making them  very fierce.I know that in capitivity  elephants are killed beaten torchered  in zoos and in all the circus,beaten to be submissive,until one day  they go mad and lash out.why could'nt a  zoo build huts with a big screen and as the people enter and  hear  the sound of the elephant and wonerful videos on the elephants gaurding ,playing etc.to educate.

i  didnt  knew  that  i  didnt  knew