“This book offers an exciting glimpse into the development of Spanish linguistic policy regarding conquered peoples in the early modern period on both sides of the Atlantic. It is a courageous undertaking, confronting the Spanish efforts to evangelize first the Arabic speakers devoted to Islam on the Iberian Peninsula and then come to grips with the multifaceted linguistic challenge of converting indigenous peoples in the Americas to Christianity.”—John Schwaller, author of The History of the Catholic Church in Latin America