When you use non-English characters in Email events / task notifications, the rich text displays correctly as right to left text in design time. However, at runtime the message content still displays as left to right when the email is sent.
After installing the Fix Pack, edit the workflow and edit the Email event / task notification. Click in the body of the Email event / task notification and finish the event. Deploy the workflow and start a new instance of the workflow. The message content will now display correctly in runtime.