catalan braille is the braille alphabet of the catalan language. it is very close to french braille: it uses the 26 letters of the basic braille alphabet, plus several additional letters for "ç" and what are, in print, vowel letters with diacritics; these differ from their french values only in the need to accommodate the catalan acute accent: "ú, ó, í" for what are in french braille "ù, œ, ì" :