In Lubuntu 14.04 I went to "Preferences> Keyboard input methods > select an input method > show all input methods" but there is no persian (or farsi) to select.
1 Answer
On the right side of your LXPanel there is a small flag or country code.
If you right click that icon, a menu will pop up.
Choose Keyboard Layout Handler Settings and uncheck keep system layouts.
When you choose add a menu of available languages will be displayed.
Scroll down to Persian and select it. Move it up if you want it to be default or leave it where it is. Your choice.
Then re-check keep system layouts.
I believe that it will not take effect until the next boot.
