The Swedish inventor Christopher Polhem had an idea of a universal language which occupied him for decades, i.e. a perfect language which can be spoken and understood by everyone, by the educated and non educated alike, and no matter where they come from. Polhem did a large number of sketches for such a universal language, among others a manuscript concerning a lunar language, which was completely regular and easy to learn. Here he uses the literary theme of imaginary voyages in connection with the contemporary interest in Laplanders. His constructions of a perfect language have to do with his own poor educational background, his own difficulties in reading books, understand the Latin and spelling correctly. Universal language schemes were ...