Hi Sagar,
Thanks for reaching out here and letting us know you're having an issue with the Hindi language elements. Can you let us know if you're using Storyline 1 or Storyline 2? You'll also want to make sure you're on the latest update of each (Update 8 and update 4 respectively).
Since I don't read Hindi, I'm not sure I'm clear on the error you're seeing - but if you could share some examples of how it's supposed to look vs. how it does look or what you're seeing that would be super helpful.
You'll also want to confirm that you're working with local project files as described here and testing your published content within the intended environment.