Orangutan LANGUAGE

I read "Orangutan LANGUAGE."
The word 'orangutan' means 'person of the forest' in the Malay language.
Because orangutans are so much like humans.
For example ,orangutans have the ability to communicate through language.
Rob Shumaker is the coordinator of the Orangutan Language Project at the National Zoo in Washington,D.C.
The purpose of the project is to study the orangutan's minds and discover more about how they think.
Shumaker's language program is voluntary for orangutan.
Because they are allowed to move around freely and given them choices on where they want to go.
Through his project, I understood orangutan's ability level.
Orangutan is intelligent animal!