DotNetNuke does not Support Right To Left Site when Language is RTL Direction.The whole directions, floating, margion, padding, text aligning..etc are resident at the css files like portal.css, default.css, module.css, skin.css and many many more.Suppose that we create two css files for each direction. For example, portal_ltr.css for LTR Languages and portal_rtl.css for RTL Languages like arabic.How could this implemented with 3 code lines and forget all html/css modifications?All css files are loaded dynamically which is good news using a method called PageBase.RegisterStyleSheet which takes 3 parameters one of them is our target "styleSheet".At this method we can add the direction to the stylesheet parm using replace methodLike this: -------------------------------string Direction = CultureInfo.CurrentCulture.TextInfo.IsRightToLeft ? "rtl" : "ltr";var newstyleSheet = styleSheet.Replace(".css", string.Format("_{0}.css", Direction));Nice, Suppose you forgot to change the css file name like: default.css to default_rtl.css.then your page or module will be loaded without the style and .... you know what happened.Before loading newstyleSheet file we must check if it exists or not.Like This: -------------------------------------------if (File.Exists(page.MapPath(newstyleSheet)))styleSheet = newstyleSheet;Now Build "DotNetNuke.Library" Project & replace your site with the new DotNetNuke.dllFor a testing,Go the Default Portal Folder & create new css file named default_rtl.css then rename default.css file to default_ltr.cssBrowse your site & try to find default_ltr.css word in the page source that's if your language is LTR Direction.

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