If you think about it, all languages are made up—some are just more open about it than others. Within the past 100 years, there has been an explosion of new linguistic possibilities, both serious and silly. From the classic constructed languages of Star Trek and Tolkien to Orwellian Newspeak and pop-culture sensations Game of Thrones, The Witcher, and The Mandalorian, Yens Wahlgren opens the portal to over a hundred realms and lexicons, while offering guidance on creating your own.