To update your Farsi language pack, open persian.xml (have a copy of it just in case) located in languages folder. Find

page name="HELP_INDEX" ....   /page 

part and replace it with one in the attached file.

I am open to any comment and/or improvement.

Enjoy

P.S: it doesn't allow me to include "less than" and "greater than" mark in my code snippet above, so I had to remove them.

Your contribution is greatly appreciated.