Napoleon's educational reforms laid the foundation of a modern system of education in France and throughout much of Europe. Napoleon synthesized the best academic elements from the Ancien Régime, The Enlightenment, and the Revolution, with the aim of establishing a stable, well-educated and prosperous society. He made French the only official language. He left some primary education in the hands of religious orders, but he offered public support to secondary education. Napoleon founded a number of state secondary schools (lycées) designed to produce a standardized education that was uniform across France. All students were taught the sciences along with modern and classical languages. Unlike the system during the Ancien Régime, religious topics did not dominate the curriculum, although they were present in addition to teachers from the clergy. Napoleon simply hoped to use religion to produce social stability. He gave special attention to the advanced centers, notably the École Polytechnique, that provided both military expertise and state-of-the-art research in science. Napoleon made some of the first major efforts at establishing a system of secular and public education. The system featured scholarships and strict discipline, with the result being a French educational system that outperformed its European counterparts, many of which borrowed from the French system.
Try to answer this question if possible (otherwise reply "unanswerable"): What language did Napoleon make the only official one?
French