How many letters are used in the French alphabet?
French Braille
French Braille is the original braille alphabet, and the basis of all others. The alphabetic order of French has become the basis of the international braille convention, used by most braille alphabets around the world. However, only the 25 basic letters of the French alphabet plus "w" have become internationalized; the additional letters are largely restricted to French Braille and the alphabets of some neighboring European countries.
Braille
In addition, there are ten patterns that are based on the first two letters () shifted to the right; these were assigned to non-French letters ("ì ä ò" ), or serve non-letter functions: (superscript; in English the accent mark), (currency prefix), (capital, in English the decimal point), (number sign), (emphasis mark), (symbol prefix).