Hi,
I have been developing websites with Wordrpress, Joomla and Drupal since 2008. I'm therefore skilled and experienced to deliver your project. I'm also fluent in French which could be helpful to understand the Wmaker documentation and therefore make the migration easier. I have to admit though that I do not speak Arabic I am however familiar with the challenges arising from developing RTL site templates and different character sets.
It would be helpful if you could give an indication of volume of content to be migrated by category (Joke, News, Health, Household, etc as in your current site) in order to better assess the task at hand.
Looking at your current site it looks like Joomla would be able to handle all needs you have so I don't think you should go for Drupal which adds a level of complexity when it comes to understand the concepts and maintaining the site in the future. At the other hand of the spectrum Worpdress may be a bit limited. So my recommendation would be to go for Joomla 3.2
Do not hesitate to conatct me if you have any questions and any documentation that you may have about your Wmaker implementation (even in French) is welcome as it could help me understand all your requirements.
I look forward to hearing from you and start working on your project.
Regards.
Xavier.