What language did the Romans speak?

The Romans belonged to the Indo-European tribes, and their language was Latin. It was so widespread in ancient times and in the early Middle Ages that, although it is not colloquial for several centuries, it is still used in the Catholic Church, as well as in biology, medicine and other sciences. Latin and letters are at the core of many languages. And also had a huge impact on many other languages, many words are borrowed from him and into Russian.