The paper emphasizes the importance of political languages, according to John Pocock and Quentin Skinner, as an analytical instrument to study the contestant political projects in Brazil, especially in the first half of the nineteenth century. So, it analyses the radical political language developed by the called "liberais exaltados" in the end of the First Reign and during the Regency period. It is taken as example the doctrinaire definitions given for a set of one hundred and eight concepts of political meaning produced by Nova Luz Brasileira, the main "exaltado" newspaper from the Rio de Janeiro court, published between 1829 and 1831.