In order to convert your documents, I suggest you to use Aiseesoft PDF to Word Converter. It is a free of charge application developed by Aiseesoft that beside the Arabic language, supports English, German, French, Japanese, Latin, Korean, Turkish, Thai, Greek, Cyrillic, and Chinese. Once you launch it, click the Add Files icon, select your PDF document, choose a destination directory and a Microsoft Office version and click the Conversion button. Also, Aiseesoft PDF to Word Converter has an OCR tool for conversion of image-based PDFs. If you don't like it, you can check Software Informer database for similar software.