While Hindi is the official language of India, it's spoken by people of various religions, including:
* Hinduism: The majority of Hindi speakers are Hindus.
* Islam: A large Muslim population in India also speaks Hindi.
* Sikhism: Many Sikhs in India also speak Hindi.
* Christianity: Some Christians in India also speak Hindi.
It's important to remember that language is a cultural aspect, not a religious one. People of different religions can and do speak the same language.