 The vocals and lyrics were provided by vocalist Emi Evans ( Emiko Rebecca Evans ) , a singer from England living in Tokyo . She is the singer for the band freesscape , and had previously worked on video game projects such as the Etrian Odyssey arrange albums . The Monaca team had met her when considering her for a prior project , and Okabe wanted to work with her on Nier . She was approached a few months after the initial meeting in Autumn 2008 to be the vocalist for the soundtrack . In addition to singing , Evans was asked to write her own lyrics in futuristic languages . The composers gave her preliminary version of songs and the style they wished the language to be in , such as Scottish Gaelic or French , and she invented the words . Evans wrote songs in versions of Scottish Gaelic , Portuguese , Spanish , Italian , French , English and Japanese , and wrote " Song of the Ancients " in an entirely fictional language . She wrote that song by listening to songs in as many languages as possible and jumbling them up together . For the other languages , she tried to imagine what they would sound like after 1000 years of drifting . 
