Portal Themes and Right-to-Left (RTL) Languages 
Right-to-left languages, such as Hebrew and Arabic, require different stylesheets and images than the left-to-right languages (LTR).
Due to the fact that generating stylesheets for RTL languages takes some time, when you create a new theme, only the stylesheets for the LTR languages are generated in the standard setting. You configure the generation of stylesheets in the service configuration interface.
The following functions are provided:
Uploading Images for Right-to-Left Languages
Caution
Stylesheets for RTL languages can only be generated for the Unified Rendering stylesheets of a theme part.
Caution
iViews on a page can be displayed with either RTL or LTR stylesheets only. A mixed display only works if an iView is isolated on a page.
In addition, the iView property Forced Request Languages overwrites the personalized portal language that was set. This property has an effect on the stylesheets that are generated for the overall page.