By The Dark Knight Rises , the dual audio tracks had merged. The English and the unknown language played simultaneously—one word in English, one in the other. Bane's voice became a chorus of two speakers: one brute, one almost sad.
It sounds like you're looking for a story based on a filename—likely a fan-edited or bootleg file title: "Batman - The Dark Knight Trilogy - Dual Audio - ..." Batman - The Dark Knight Triology -Dual Audio- ...
Except the voice wasn't Hindi.