Here's why:
* Language is a complex human invention: Language didn't spring into existence fully formed. It developed gradually over thousands of years through the process of evolution, with early forms of communication evolving into more complex systems.
* Tracing the origins of languages is difficult: While we have evidence of ancient languages like Sanskrit and Egyptian, pinpointing the "first" language is impossible. The earliest languages were likely oral and left no written records.
* All languages are related: Linguists believe that all modern languages stem from a single ancestor language, referred to as Proto-World.
Tamil is a very old language with a rich history. It's considered one of the oldest living classical languages, dating back to at least 2,000 years. However, it's not the "first" language, as the concept of a single, first language is not supported by scientific evidence.