 The Nahuas used the term "popolōca" much in the same way the Greek used the term "barbaros", also meaning "gibberish", to refer to non-Greek speaking strangers.The name however stuck to many languages and has caused some confusion even among linguists working with Native American languages.This confusion prompted some kind of distinction between Popoluca languages and the spelling "Popoluca" with an "u" became used for certain Mixe–Zoquean languages, while the spelling "Popoloca" with an "o" became used for certain languages of the Popolocan family of Oto-Manguean languages.