Quechua (, ; ), usually called ("people's language") in Quechuan languages, is an indigenous language family spoken by the Quechua peoples, primarily living in the Peruvian Andes. Derived from a common ancestral language, it is the most widely spoken pre-Columbian language family of the Americas, with an estimated 8–10 million speakers as of 2004. Approximately 25% (7.7 million) of Peruvians speak a Quechuan language. Quechua was the main language family of the Inca Empire. The Spanish encouraged its use until the Peruvian struggle for independence of the 1780s. As a result, Quechua variants are still widely spoken today, being the co-official language of many regions and the second most spoken language family in Peru. History Quechua had already expanded across wide ranges of the central Andes long before the expansion of the Inca Empire. The Inca were one among many peoples in present-day Peru who already spoke a form of Quechua. In the Cusco region, Quechua was influenced by neighboring languages such as Aymara, which caused it to develop as distinct. In similar ways, diverse dialects developed in different areas, influenced by local languages, when the Inca Empire ruled and imposed Quechua as the official language. After the Spanish conquest of Peru in the 16th century, Quechua continued to be used widely by the indigenous peoples as the "common language." It was officially recognized by the Spanish administration, and many Spaniards learned it in order to communicate with local peoples. The clergy of the Catholic Church adopted Quechua to use as the language of evangelization. The oldest written records of the language are by missionary Domingo de Santo Tomás, who arrived in Peru in 1538 and learned the language from 1540. He published his Grammatica o arte de la lengua general de los indios de los reynos del Perú (Grammar or Art of the General Language of the Indians of the Kingdoms of Peru) in 1560. Given its use by the Catholic missionaries, the range of Quechua continued to expand in some areas. In the late 18th century, colonial officials ended administrative and religious use of Quechua. They banned it from public use in Peru after the Túpac Amaru II rebellion of indigenous peoples. The Crown banned "loyal" pro-Catholic texts in Quechua, such as Garcilaso de la Vega's Comentarios Reales. Despite a brief revival of the language immediately after the Latin American nations achieved independence in the 19th century, the