For a "PROPER HQ" encode, providing these options distinguishes the file from basic, low-effort rips by catering to a more discerning audience.
You can watch the full Hindi dubbed version of the film here to see how these features might be applied:
A specific track that only activates when there is on-screen text (like a letter, shop sign, or location tag) that hasn't been translated by the dubbing. This ensures you never miss a plot point written on screen while keeping the rest of the screen clear.