how to add arabic to microsoft word?

i just bought a new laptop with windows 7. its the first time i use windows 7 and the new microsoft word.
i googled how to change the language to arabic, but for some reason when u go menu-> word options -> advanced-> show document content, the part that is supposed to change the language isnt there.
what do i do?

I hope this might help you..

You have to add additional editing language... as shown here

thanks but i have no language part :/
do i need to get another version of microsoft?

well, which version of MS Office 2010 are you using?

Well, for Office 2007 you can enable the language by changing the language options.

1. Go to "Word Options"



2. Popular > Language Settings



3. Select your preferred language, click "Add"

4. Change your "Primary Editing Languge"

5. Restart MS Office.

I hope you will be good to go.

thank u,
i did that, it writes from right to left, but the arabic letters won't show. it still writes in english.

you have to enable a arabic option in regional setting in control panel...

it worked :) thank u sooo much!
and thanks everyone for your help!