Problem with Gujarati text

try to use older version of RASA font
i have the same issue and i retured to older version of Rasa
first unistall or deactivate any Rasa font
attempt to add/install this font https://www.1001fonts.com/rasa-font.html (v1.001)

You may find a more detailed explanation in my blog post:

http://blog.lilybiri.com/fonts-in-captivate

To be sure your learners will see the font you used, best practice is to use only Websafe or Adobe fonts. I just checked and the font you are using can be an Adobe font, here is the link to one part of that font family: 

https://fonts.adobe.com/fonts/rasa

 If your font is a system font, replace it by this Adobe font. Depending on your plan, you are entitled to a number of those fonts for free (lowest plan is included with Captivate). You will have to indicte the domain(s) to include after publishing, and all the text will be rendered in the font. It doesn't matter in that case whether you use a responsive/non-responsive, dynamic or static text.

There are a couple of things to remember about Fonts from Adobe. If your project is a responsive design project you will need to provide the URL of where the project will reside when you publish your work. This would be true of non-responsive (Blank Project) as well if the text is dynamic. For example, if you were displaying text from a user or system variable. The reason for this is that your learners will not have the Rasa font installed and it will attempt to use another font in it's place. I tested this Font with a Blank Project and here are my published results.