Hello, were you able to find a solution to this? I am having the same problem. I have selected "Show Indic Options" but still Indic fonts do not show.
Your post moved from Illustrator Scripting forum to Illustrator forum.
Please try solution mentioned in link below:
If it still does not help please revert with some more information like
Operating System(Exact version of Windows or MAC)
Exact version of Illustrator
Language and font you are using?