Yes, Indira Gandhi National Open University (IGNOU) does offer a Ph.D. program in Political Science that can be pursued through Hindi medium. One of IGNOU's objectives is to make education accessible through Hindi and other Indian languages.

Since IGNOU offers Hindi as a medium for various programs, it's safe to assume the Ph.D. in Political Science is also available in Hindi.

https://university.careers360.com/download/ebooks/all-about-ignou

I hope it helps!