The Academy winning director hired linguistic professor Paul R Frommer to create 'Na'vi', the language spoken by aliens on the distant planet of Pandora where the film is set, reported Los Angeles Times.

Frommer created an entire functioning language for the tribe of 10-foot-tall blue aliens who inhabit the imaginary planet.
The academician spent four years creating the language and said that he wanted fans to imbibe it just like 'Klingon', the mother tongue of the characters of  'Star Trek'.

"How often do you get an opportunity like this?" said Frommer but the actors who had bend their tongues around the invented vocabulary and syntax were slightly less charmed by the experience.

"Oh, it was so hard and I was really concerned about it. I didn't think I could get through it. I'm not good with languages. All the actors, we worked together. It was the only way," said Zoe Saldana, who portrays an alien named Neytiri in the sci-fi adventure that opens in theatres December 18.
"I'm still working and I hope that the language will have a life of its own," the professor said. "For one thing, I'm hoping there will be prequels and sequels to the film, which means more language will be needed," said Frommer.