Followers or believers of a religion would generally be named after that certain religion. For example: People who believe in Christianity would be called Christians; Atheism- Atheists, Catholicism- Catholics, Buddhism- buddhists, Hinduism- Hindu, and so forth.
Followers of Hinduism are called Hindus.The followers of the religion Hinduism are called Hindus. Hindus are spread all the over world. Sikhism is another religion that has been developed from the Hindu religion.
Because the populace is majority Hindu and it is the "birthplace" of the Hindu religion.
The religion is called the "Bahá'í Faith"; the followers are "Bahá'ís".
Confucianist.
A person who does not in religion is called an Atheist - Atheism
Hindu is not a language, it is a Religion. This is like asking where do people speak jew or Christian? Followers of Hinduism speak many different languages.
pujari or pandit
The word Vedas belongs to the Hindu religion. It is a religious book that requires God's Wishes for you and some many many more words. Hindu Festivals: Diwali Durga Ashtami Ekadashi will be in many months too!!
Judaism followers are called Jews
Hinduism is a Religion to follow. Follower of Hinduism is called a Hindu.
The religion is called Islam; the followers are called muslims; their holy book is the Quran.