A person fluent in Quechua is an INCA, which is a four-letter word. The Incas were the largest empire in pre-Columbian America, located in what is now Peru and parts of Ecuador, Bolivia, Chile, and Argentina. They spoke the Quechua language, which is still spoken today by millions of people in the Andes region. A person fluent in Quechua would be able to communicate with many people in the Andes region.