Hi, I'm going to answer this question as if you asked "What cultural groups were found in the New World?" The wording is a bit off-putting in the original question, so I hope I can do my best to help. :)
The New World we be specific to the western hemisphere of the world so I will talk about the groups found there during that time. Specifically the Native-Americans.
Cherokee, Chickasaw, Choctaw, Creek and Seminole were the five main tribes that were found in the new world, and while all being native American, they lived in varying tribes with completely different cultures, all speaking a form of the Muskogean language.
Sorry, I know this isn't much to go on, but it would take too long to go in depth about the tribes because of their rich history. Hope this helps! Feel free to message me for more help. :)
The answer is The Republic of San Marino
