Someone else seems to be in this position, judging from this post on the Tech Support Forum.
The answers from the site moderators indicate that you can't legally download these.
If you do not have the English pak on the CD like Koala said we wont be able to help you as it will infringe on EA's copyright agreement.
Yes, there are different DVD's of the game with different contents (language pack), each DVD has a license agreement. So If you have a DVD from Australia and send it to Turkey but the Australian version has no Turkish language pack you are unable to alter the game due to the license agreement as it will be altering the original copy which resides on the DVD.