 It produced a trilingual catechism (then known as "Catechism of St. Toribius"), in Spanish, Quechua and Aymara.This catechism was later translated into the Guaraní language by Luis de Bolaños, and adopted by the First Synod of Asunción (1603) for use in the area of the Upper Paraná River basin (eastern Brazil, Paraguay and northeastern Argentina).The Council also encouraged the establishment of seminaries.