User blog comment:Inferno Pendragon/World Building 1 : Tech Levels/@comment-1070010-20160302153146/@comment-1705775-20160302161136

also the device is not truly "universal", rather it allows the understanding of most language.. Eodians, Tall Man and several other species can't be translated via it, so it has limitations : which means it could be made via a "star chart" of collected languages from some ancient super-power, which Earth either got gifted, stole or simply reverse-engineered from a crash / incident.