add language to dictionary?

You would need to find someone who has created an Arabic module or make one yourself. This page mentions the Quran:

http://m10lmac.blogspot.com/2008/03/more-dictionaries-for-leopards.html

If you are really asking about spell checking, dictionary.app is not relevant, and you would need to find something different:

http://m10lmac.blogspot.com/2011/06/extra-spell-checking-dictionaries-for.html

This solved my question by LIONXq8 on May 5, 2012 11:58 PM

I found by accident you are lucky 😉

here you are the link below :

http://files.brothersoft.com/home_education/language_translation/ArabicPlugin10. zip

this solved my same problem

http://badrit.com/blog/2014/1/9/arabic-language-support-to-dictionary-app-on-mac -os-x#.VbqBMni4LWE

kdahab wrote:

this solved my same problem

http://badrit.com/blog/2014/1/9/arabic-language-support-to-dictionary-app-on-mac -os-x#.VbqBMni4LWE

Very useful, thanks!