Persian (Farsi) transliteration was incomplete and most of the characters were proposed according to Arabic transliteration which would be confusing for Persians. I changed some of them and added new ones like question mark, etc.. Please note that Persian has several "z" and "s" since the language alphabet share a lot of similarity with Arabic. However, these are all pronounced the same way in Persian and it makes more sense to have the same character for all in each group.
M. Hadi
