Hello,

Thank you for your post. Yes, Kentico CMS generally supports RTL, but we didn't make very detailed tests yet. Here's how to configure it:

Open the web.config file and set the correct culture information – e.g.:
<globalization requestEncoding="utf-8" responseEncoding="utf-8" culture="ar-DZ" uiCulture="ar-DZ"
/>

Open <web project>\cmsdesk\aspnet_client\fckeditor\fckconfig.js and set the following configuration options to new values:
FCKConfig.DefaultLanguage = 'ar' ;
FCKConfig.ContentLangDirection = 'rtl' ;

Open main.css stylesheet of the main web project (<web project>\main.css) and add the following line inside the body {} style:
direction: rtl;

Open the stylesheet of the CMSDesk project (<web project>\cmsdesk\design\cmsdesk.css and add the following line inside the BODY {} style:

direction: rtl;

Open the web site, sign in and see the new desing. Please note: the design may be a little misaligned; you may need to adjust it by modifying the CMSDesk.css stylesheet. Should you need any help with RTL support, please contact us at support@kentico.com.

Best Regards,