Thank you for using this channel to get help from us.
I know how it feels when something isn’t working the way it should, let’s get this resolved. A few questions — is this the first time that you are using Hindi language? What message are you getting every time you try the Hindi language? What troubleshooting steps did you take so far?
Check this link on how to add the language on your Google Home app.
Keep me posted.
We haven’t heard back from you, I'll be locking this thread in 24 hours. Feel free to create a new one if you have more questions or have other concerns in the future.