The Jesuits learned Indian languages and developed ways to write them using the Roman alphabet. They established a printing press at this mission, for which it became renowned. Not only did the Jesuits print works in Spanish and Latin (the language of the Catholic liturgy, Bible and prayer book), but they translated the Bible and other Christian works into Indian languages, as well as printing dictionaries.
Father Antonio Garriga was a Spanish Jesuit attached to Nuestra Señora de Loreto beginning in the last years of the 17th century and extending well into the early 18th century. He was particularly known as a linguist and missionary to the Moro people; he worked in the region from 1696 and served as Superior of the Mission several times. His book, Practical Instruction to Order One’s Life According to Saintly Precepts (c.1713) was the second oldest book printed at the mission.