diff --git a/Kooboo.CMS/Kooboo.CMS.Membership/Services/MembershipUserManager.cs b/Kooboo.CMS/Kooboo.CMS.Membership/Services/MembershipUserManager.cs
index 1152303a..1e98105e 100644
--- a/Kooboo.CMS/Kooboo.CMS.Membership/Services/MembershipUserManager.cs
+++ b/Kooboo.CMS/Kooboo.CMS.Membership/Services/MembershipUserManager.cs
@@ -17,6 +17,7 @@
 using System.Text.RegularExpressions;
 using Kooboo.CMS.Common.DataViolation;
 using Kooboo.CMS.Membership.OAuthClients;
+using Kooboo.Globalization;
 
 
 namespace Kooboo.CMS.Membership.Services
@@ -67,11 +68,11 @@ public virtual MembershipUser Create(Kooboo.CMS.Membership.Models.Membership mem
             List<DataViolationItem> violations = new List<DataViolationItem>();
             if (membershipUser.AsActual() != null)
             {
-                violations.Add(new DataViolationItem("UserName", userName, "DuplicateUserName"));
+                violations.Add(new DataViolationItem("UserName", userName, "DuplicateUserName".Localize()));
             }
             if (_provider.QueryUserByEmail(membership, email) != null)
             {
-                violations.Add(new DataViolationItem("Email", email, "DuplicateEmail"));
+                violations.Add(new DataViolationItem("Email", email, "DuplicateEmail".Localize()));
             }
             if (violations.Count > 0)
             {
@@ -237,11 +238,11 @@ public virtual bool Validate(Kooboo.CMS.Membership.Models.Membership membership,
             }
             if (!membershipUser.IsApproved)
             {
-                violations.Add(new DataViolationItem("UserName", userName, "The member still not actived."));
+                violations.Add(new DataViolationItem("UserName", userName, "The member still not actived.".Localize()));
             }
             if (membershipUser.IsLockedOut)
             {
-                violations.Add(new DataViolationItem("UserName", userName, "The member was locked out."));
+                violations.Add(new DataViolationItem("UserName", userName, "The member was locked out.".Localize()));
             }
             if (violations.Count > 0)
             {
@@ -275,11 +276,11 @@ public virtual bool Activate(Kooboo.CMS.Membership.Models.Membership membership,
             List<DataViolationItem> violations = new List<DataViolationItem>();
             if (membershipUser == null)
             {
-                violations.Add(new DataViolationItem("UserName", userName, "The member does not exists."));
+                violations.Add(new DataViolationItem("UserName", userName, "The member does not exists.".Localize()));
             }
             if (string.IsNullOrEmpty(activateCode))
             {
-                violations.Add(new DataViolationItem("ActivateCode", userName, "Activate code is null."));
+                violations.Add(new DataViolationItem("ActivateCode", userName, "Activate code is null.".Localize()));
             }
             if (membershipUser.IsApproved)
             {
@@ -340,7 +341,7 @@ public virtual MembershipUser ForgotPassword(Kooboo.CMS.Membership.Models.Member
             List<DataViolationItem> violations = new List<DataViolationItem>();
             if (membershipUser == null)
             {
-                violations.Add(new DataViolationItem("UserName", userName, "The member does not exists."));
+                violations.Add(new DataViolationItem("UserName", userName, "The member does not exists.".Localize()));
             }
             if (violations.Count > 0)
             {
@@ -364,11 +365,11 @@ public virtual bool ResetPassword(Kooboo.CMS.Membership.Models.Membership member
             List<DataViolationItem> violations = new List<DataViolationItem>();
             if (membershipUser == null)
             {
-                violations.Add(new DataViolationItem("UserName", userName, "The member does not exists."));
+                violations.Add(new DataViolationItem("UserName", userName, "The member does not exists.".Localize()));
             }
             if (string.IsNullOrEmpty(activateCode))
             {
-                violations.Add(new DataViolationItem("ActivateCode", userName, "Activate code is null."));
+                violations.Add(new DataViolationItem("ActivateCode", userName, "Activate code is null.".Localize()));
             }
 
             var valid = !string.IsNullOrEmpty(membershipUser.ActivateCode) && membershipUser.ActivateCode == activateCode;
@@ -380,7 +381,7 @@ public virtual bool ResetPassword(Kooboo.CMS.Membership.Models.Membership member
             }
             else
             {
-                violations.Add(new DataViolationItem("ActivateCode", userName, "Activate code is invalid."));
+                violations.Add(new DataViolationItem("ActivateCode", userName, "Activate code is invalid.".Localize()));
             }
             if (violations.Count > 0)
             {
diff --git a/Kooboo.CMS/Kooboo.CMS.Web/Areas/Contents/Controllers/MediaContentController.cs b/Kooboo.CMS/Kooboo.CMS.Web/Areas/Contents/Controllers/MediaContentController.cs
index 749b6729..25a31fd0 100644
--- a/Kooboo.CMS/Kooboo.CMS.Web/Areas/Contents/Controllers/MediaContentController.cs
+++ b/Kooboo.CMS/Kooboo.CMS.Web/Areas/Contents/Controllers/MediaContentController.cs
@@ -18,6 +18,7 @@
 using Kooboo.CMS.Web.Authorizations;
 using Kooboo.CMS.Web.Models;
 using Kooboo.Drawing;
+using Kooboo.Drawing.Filters;
 using Kooboo.Globalization;
 using Kooboo.IO;
 using Kooboo.Web.Mvc;
@@ -690,6 +691,89 @@ public virtual ActionResult IsFileNameAvailable(string name, string folderName,
             return Json(true, JsonRequestBehavior.AllowGet);
         }
         #endregion
+
+        #region Watermark
+
+        [Kooboo.CMS.Web.Authorizations.Authorization(AreaName = "Contents", Group = "", Name = "Content", Order = 1)]
+        [HttpPost]
+        public virtual ActionResult Watermark( string folderName, string[] docs )
+        {
+            var data = new JsonResultData(ModelState);
+            data.RunWithTry(( resultData ) =>
+            {
+                if( !string.IsNullOrWhiteSpace(folderName) && docs != null )
+                {
+                    var folder = FolderManager.Get(Repository, folderName).AsActual();
+                    var uuids = from uuid in docs where !string.IsNullOrEmpty(uuid) select uuid;
+                    foreach( var uuid in uuids )
+                    {
+                        var content = folder.CreateQuery().WhereEquals("UUID", uuid).First();
+                        var provider = Providers.DefaultProviderFactory.GetProvider<IMediaContentProvider>();
+                        using( var sourceStream = new MemoryStream(provider.GetContentStream(content)) )
+                        {
+                            var imageFormat = GetImageFormat(Path.GetExtension(content.FileName));
+                            if( imageFormat == null )
+                            {
+                                continue;
+                            }
+                            var stream = Watermark(Repository, sourceStream, imageFormat);
+                            ContentManager.Update(Repository, folder, uuid, content.FileName, stream, User.Identity.Name);
+                        }
+                    }
+                }
+                resultData.ReloadPage = true;
+            });
+            return Json(data);
+        }
+
+        public static ImageFormat GetImageFormat( string extension )
+        {
+            switch( extension.ToLower() )
+            {
+                case ".jpg":
+                case ".jpeg":
+                    return ImageFormat.Jpeg;
+                case ".gif":
+                    return ImageFormat.Gif;
+                case ".png":
+                    return ImageFormat.Png;
+                case ".bmp":
+                    return ImageFormat.Bmp;
+            }
+            return null;
+        }
+        private Stream Watermark( Repository repository, Stream stream, ImageFormat imageFormat )
+        {
+            var waterImageFile = GetWaterImage(repository);
+            if (System.IO.File.Exists(waterImageFile))
+            {
+                var waterImage = Image.FromFile(waterImageFile);
+
+                var rawImage = Image.FromStream(stream);
+
+                var filter = new ImageWatermarkFilter
+                {
+                    WaterMarkImage = waterImage,
+                    Alpha = 0.7f,
+                    Valign = WaterMarkFilter.VAlign.Right,
+                    Halign = WaterMarkFilter.HAlign.Bottom
+                };
+                var image = filter.ExecuteFilter(rawImage);
+
+                var ms = new MemoryStream();
+                image.Save(ms, imageFormat);
+                ms.Seek(0, SeekOrigin.Begin);
+                return ms;
+            }
+            return stream;
+        }
+        private string GetWaterImage( Repository repository )
+        {
+            var path = new RepositoryPath(repository);
+
+            return Path.Combine(path.PhysicalPath, "Watermark.png");
+        }
+        #endregion
     }
 
     public class TextFileModel
diff --git a/Kooboo.CMS/Kooboo.CMS.Web/Areas/Contents/Views/MediaContent/Index.cshtml b/Kooboo.CMS/Kooboo.CMS.Web/Areas/Contents/Views/MediaContent/Index.cshtml
index a50ca012..77fbf5ff 100644
--- a/Kooboo.CMS/Kooboo.CMS.Web/Areas/Contents/Views/MediaContent/Index.cshtml
+++ b/Kooboo.CMS/Kooboo.CMS.Web/Areas/Contents/Views/MediaContent/Index.cshtml
@@ -58,6 +58,14 @@
                         @("Export".Localize())
                     </a>
                 </li>
+                <li>
+                    <a href="@Html.Raw(this.Url.Action("Watermark", ViewContext.RequestContext.AllRouteValues()))"
+                       data-show-on-check="Any"
+                       data-command-type="AjaxPost"
+                       data-confirm="@("Are you sure you want to add watermark to these items?".Localize())">
+                        @("Watermark".Localize())
+                </a>
+            </li>
             </ul>
         </li>
         @foreach (var group in Kooboo.CMS.Sites.Extension.UI.TopToolbar.ToolbarButtons.GetToolbarButtons(ViewContext.RequestContext))
diff --git a/Kooboo.CMS/Kooboo.CMS.Web/Areas/Contents/Views/MediaContent/Index_Grid.cshtml b/Kooboo.CMS/Kooboo.CMS.Web/Areas/Contents/Views/MediaContent/Index_Grid.cshtml
index 4294512e..bdf9227e 100644
--- a/Kooboo.CMS/Kooboo.CMS.Web/Areas/Contents/Views/MediaContent/Index_Grid.cshtml
+++ b/Kooboo.CMS/Kooboo.CMS.Web/Areas/Contents/Views/MediaContent/Index_Grid.cshtml
@@ -62,6 +62,14 @@
                         @("Export".Localize())
                     </a>
                 </li>
+                <li>
+                    <a href="@Html.Raw(this.Url.Action("Watermark", ViewContext.RequestContext.AllRouteValues()))"
+                       data-show-on-check="Any"
+                       data-command-type="AjaxPost"
+                       data-confirm="@("Are you sure you want to add watermark to these items?".Localize())">
+                        @("Watermark".Localize())
+                    </a>
+                </li>
             </ul>
         </li>
         @foreach (var group in Kooboo.CMS.Sites.Extension.UI.TopToolbar.ToolbarButtons.GetToolbarButtons(ViewContext.RequestContext))
diff --git a/Kooboo.CMS/Kooboo.CMS.Web/I18N/ru-RU.resx b/Kooboo.CMS/Kooboo.CMS.Web/I18N/ru-RU.resx
index e29a6868..db06f098 100644
--- a/Kooboo.CMS/Kooboo.CMS.Web/I18N/ru-RU.resx
+++ b/Kooboo.CMS/Kooboo.CMS.Web/I18N/ru-RU.resx
@@ -1,11 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <root>
   <!-- 
-Creation date: 2012/05/18
-Version 1.0 for KooBoo CMS 3.2
-This translation is made by Ella S. (http://kooboo-cms.ru/)    
-
-Microsoft ResX Schema 
+    Microsoft ResX Schema 
     
     Version 2.0
     
@@ -2193,4 +2189,10 @@ Microsoft ResX Schema
   <data name="Goto" xml:space="preserve">
     <value>Перейти</value>
   </data>
+  <data name="Are you sure you want to add watermark to these items?" xml:space="preserve">
+    <value>Вы действительно хотите добавить водяной знак на выбранные элементы?</value>
+  </data>
+  <data name="Watermark" xml:space="preserve">
+    <value>Водяной знак</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/Kooboo.CMS/Publish/Default/I18N/en-US.resx b/Kooboo.CMS/Publish/Default/I18N/en-US.resx
index 96dbc147..939dfc2e 100644
--- a/Kooboo.CMS/Publish/Default/I18N/en-US.resx
+++ b/Kooboo.CMS/Publish/Default/I18N/en-US.resx
@@ -1,5 +1,64 @@
 <?xml version="1.0" encoding="utf-8"?>
 <root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
   <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
     <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
     <xsd:element name="root" msdata:IsDataSet="true">
@@ -382,4 +441,10 @@
   <data name="Save" xml:space="preserve">
     <value>Save</value>
   </data>
+  <data name="DuplicateEmail" xml:space="preserve">
+    <value>Email is already taken</value>
+  </data>
+  <data name="DuplicateUserName" xml:space="preserve">
+    <value>Username is already taken</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/Kooboo.CMS/Publish/Default/I18N/ru-RU.resx b/Kooboo.CMS/Publish/Default/I18N/ru-RU.resx
index e29a6868..9a20a046 100644
--- a/Kooboo.CMS/Publish/Default/I18N/ru-RU.resx
+++ b/Kooboo.CMS/Publish/Default/I18N/ru-RU.resx
@@ -1,11 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <root>
   <!-- 
-Creation date: 2012/05/18
-Version 1.0 for KooBoo CMS 3.2
-This translation is made by Ella S. (http://kooboo-cms.ru/)    
-
-Microsoft ResX Schema 
+    Microsoft ResX Schema 
     
     Version 2.0
     
@@ -2193,4 +2189,31 @@ Microsoft ResX Schema
   <data name="Goto" xml:space="preserve">
     <value>Перейти</value>
   </data>
+  <data name="Activate code is invalid." xml:space="preserve">
+    <value>Неверный код активации.</value>
+  </data>
+  <data name="Activate code is null." xml:space="preserve">
+    <value>Не указан код активации.</value>
+  </data>
+  <data name="DuplicateEmail" xml:space="preserve">
+    <value>Данный email уже зарегистрирован в системе</value>
+  </data>
+  <data name="DuplicateUserName" xml:space="preserve">
+    <value>Данный логин занят</value>
+  </data>
+  <data name="The member does not exists." xml:space="preserve">
+    <value>Указанный пользователь не найден.</value>
+  </data>
+  <data name="The member still not actived." xml:space="preserve">
+    <value>Учетная запись не активированна</value>
+  </data>
+  <data name="The member was locked out." xml:space="preserve">
+    <value>Учетная запись заблокированна</value>
+  </data>
+  <data name="Are you sure you want to add watermark to these items?" xml:space="preserve">
+    <value>Вы действительно хотите добавить водяной знак на выбранные элементы?</value>
+  </data>
+  <data name="Watermark" xml:space="preserve">
+    <value>Водяной знак</value>
+  </data>
 </root>
\ No newline at end of file