The 1847 version was performed a great deal all over Italy. Then, in 1865, Verdi made several changes to the opera in a revised version. It was to be performed in Paris, and in France people expected to have ballet music in operas. Verdi wrote some music for the dancers, and took the opportunity to make other changes as well. Verdi worked in Italian, and had it translated into French for the performance there, but people don't use the French translation. They instead use all his changes for the French version, but keep the Italian text.