A number of times in the film, we hear chanting, singing (whatever it may be). At a key moment, when Bruce is ascending up and out of the prison, we learn what they are chanting is "rise."
What language are they speaking?
Deh-Shay Deh-Shay Bah-Sah-Rah is what they are chanting.
There are strong notions suggesting that its moroccan which translate to He Rises. He Rises. The guy in the movie says it means rise. I am guessing chant is the motivation for the person to climb up which could literally means He rises when the crowd are chanting.
The second notion is a bunch of people suggesting its spanish because of Bane's actual origin in comics and Spanish translation means "clear out the trash". but these are the two strong theories i could find so far.
Edit: Updated after confirmation from comments below
They chanted like,
If we translate the chant to Hindi, which closely means,
I think, Nolan would've chosen that phrase because the pitfall/prison portrayed in the movie is Mehrangarh Fort, located in India. So, I guess Nolan would be using the Hindi chant.
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