SPRegionalSettings.IsUIRightToLeft Property
Gets a Boolean value that indicates whether the Web site user interface (UI) uses a right-to-left language.
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Available in Sandboxed Solutions: Yes
Available in SharePoint Online
Property Value
Type: System.Booleantrue if the Web site UI uses a right-to-left language; otherwise, false.