DiY-CMSDo It Yourslef Content Management System is a feature-rich, php-built, mysql-based, opensource and free CMS. It is suitable to manage any kind of contents. It is modular, extensible and easliy skinnable. Build your own modules for specific purposes, add certain functionalites to suit your needs and design a theme that represents the content of your website.
Basically, multilingual is support for interface translation and not content. So say you want to change the interface of the admin area to arabic, dutch or any other language, then DiY-CMS will allow you to do so. In fact Arabic translation already exits and you can easily, with a bit of development switch between languages.
In terms of content multilingual, there is no support for this feature currently as it overloads database and the cms in general.
Hope this answers your question