The research came from a linguist at the University of Kentucky and it takes into account decades of work.
Historians and scholars have long tried to understand how our ancient ancestors sounded and through the study of volumes of work they think they might just know.
Professor Andrew Byrd combined Latin, Greek, and Sanskrit to come up with what he called PIE.
PIE stands for Proto-Indo-European, a language they think was spoken across Europe and Asia from around 4,500 BCE to 2,500 BCE.
Byrd calls it "a very educated approximation."
Working for the magazine Archaeology, Byrd recorded a story using the old language. The story was originally written in 1868 and described how animals feel about being forced to serve humans.
Byrd told the Huffington Post that English, Swedish, and Farsi all have their origins in Indo-European languages.
"Farsi and English were 6,500 years ago the same language," he said. "That's pretty cool, and it kind of gives you a sense of unity."