Rapanui is a minority language as most Rapa Nui people speak Spanish as their first language. Spanish is the most widely spoken language on Easter Island and the primary language of education and administration. It is believed that Rapanui is currently undergoing a shift towards more Spanish sentence structure.he Rapa Nui currently speak Spanish and the traditional Rapanui language. The Rapanui language, also known as Pascuan, is classified as an Eastern Polynesian language and is currently written in Latin script.