By using dual audio, you preserve the original sound effects and music (which are identical on both tracks) while only swapping the voice layer.
For the best experience, look for files where the Dual Audio tracks are or AC3 5.1 . This means the sound is surround sound. When the T-1000 reforms his arm into a blade, you want to hear the "shing" in your rear speakers, regardless of whether you are listening in Hindi or English. The Terminator 2 Judgment Day English Movie Dual Audio