An ancient language is any language originating in times that may be referred to as ancient. The oldest Language in the world is Sanskrit, Tamil and Hebrew that are over 5000 years old! Followed by Chinese, Arabic, Lithuanian, and more!. This is a list of languages arranged by the approximate dates of the oldest existing texts recording a complete sentence in the language. Is Tamil the OLDEST Language in the World? 587,196 views587K views. Nearly 78 million people speak Tamil around the world, and it is the only classical language that has survived in the modern world.