I'm going to tell you how to change Persian or Arabic fonts in beloved Galaxy Note3!!
First of all you need to have Root access , with a simple search in forums you can findout how to Root.
Then you got to install "Root Explorer " or any file manager you know how to work with and gives you system file access .
Now download any font you like or copy from your C:windows/font folder to your SD card and rename it to GS45_Arab_AndroidOS.ttf the font file must be in ttf format itself, which all are in.
Next go to Root/system/fonts and change the font file with name GS45_Arab_AndroidOS.ttf to GS45_Arab_AndroidOS2.ttf or anything so when you regret changing your font you have the original one lol .
However, copy your new GS45_Arab_AndroidOS.ttf this folder.
TADA you just have changed your FONT !!