Sanatana Dharma is is the original name of what is now popularly called Hinduism. Sanatana Dharma is the world's most ancient culture and the socio, spiritual, and religious tradition of almost one billion of the earth's inhabitants.
Sanskrit is considered to be the oldest language in human history. Sanskrit is the progenitor and inspiration for virtually every language spoken in India. Sanskrit has a tradition going back at least 5,000 years and is the language in which every ancient Hindu text, devotional or otherwise, is written in.