There is a setting in the language file located at:
/language/[yourlanguage]/settings.ini
The entire contents of that file for the english language are:
native_name = "English"
; Switch the layout to right-to-left instead of left-right, remove the ; from
; the line below.
; RTL = 1
You would want to change it to:
native_name = "Arabic"
; Switch the layout to right-to-left instead of left-right, remove the ; from
; the line below.
RTL = 1
