Tahitian language
While Old Rapa contributes a majority of Reo Rapa grammar words, some are taken from the Tahitian language as well such as the negative words, "aita" and "eiaha". While "aita" is used as a simple "no" in Reo Rapa, "eiaha" is used to add a negative to a sentence to change a positive "yes" sentence to a negative "no" sentence.