Complex sentence: In the tradition of Jesuits, Anchieta was a prolific rapporteur, communicating mainly by letters to his superiors, writing flawlessly in Spanish, Portuguese, Latin and Tupi.
Split into simpler sentences: In the tradition of Jesuits, Anchieta was a prolific rapporteur, communicating by letters to his superiors. He could write flawlessly in Spanish, Portuguese, Latin and Tupi.