Copernicus spoke several Latin, German, and Polish with equal fluency. He also spoke Greek and Italian.The vast majority of Copernicus’ surviving works are in Latin, which in his lifetime was the language of academia in Europe. Latin was also the official language of the Roman Catholic Church and of Poland’s royal court, and thus all of Copernicus’ correspondence with the Church and with Polish leaders was in Latin.
There were no great outcries or persecutions by the Roman Catholic Church after the publication of De revolutionibus orbium coelestium. As a matter of fact, Copernicus considered himself inspired directly by God. He was actually mocked in a contemporary play because of it.
Modern astronomy and science owe a great deal to this revolutionary thinker. While we take for granted today, that the Sun in the center of the solar system, no one believed that before Copernicus. He risked his professional reputation to bring great truth to light.
Thank you, Nicolaus.