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

Due to the intricacies of different languages, any "universal translator device" has got to function via some sort of magic or cosmic force. If it were restricted to Earth languages, then yes, it could be plausible for the "device" to be solely technological.

Then again, our Multiverse is a dream. Any "common universal language" could be the result of said language being the Dreamer's own.