The Corsican language has been influenced by the languages of the major powers taking an interest in Corsican affairs; earlier by those of the medieval Italian powers: Papal States (828–1077), Republic of Pisa (1077–1282) and Republic of Genoa (1282–1768), more recently by France (1768–present), which, since 1859, has promulgated the official Parisian French. The term "gallicised Corsican" refers to the evolution of Corsican starting from about the year 1950. The term "distanciated Corsican" refers to an idealized variety of Corsican following linguistic purism, by means of removing any French-derived elements.