diff --git a/Yavsc/Attributes/Validation/RequiredAttribute.cs b/Yavsc/Attributes/Validation/RequiredAttribute.cs
new file mode 100644
index 00000000..2ae3adc4
--- /dev/null
+++ b/Yavsc/Attributes/Validation/RequiredAttribute.cs
@@ -0,0 +1,58 @@
+using System;
+
+namespace Yavsc.Attributes.Validation
+{
+    public class YaValidationAttribute : System.ComponentModel.DataAnnotations.ValidationAttribute
+    {
+        public YaValidationAttribute() : base(()=> Startup.GlobalLocalizer["validationError"])
+        {
+
+        }
+        public override string FormatErrorMessage(string name)
+        {
+            return Startup.GlobalLocalizer[name];
+        }
+    }
+    
+    [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Parameter, AllowMultiple = false)]
+       public class YaRequiredAttribute : YaValidationAttribute
+    {
+
+        /// <summary>
+        /// Gets or sets a flag indicating whether the attribute should allow empty strings.
+        /// </summary>
+        public bool AllowEmptyStrings { get; set; }
+         public YaRequiredAttribute (string msg) : base()
+         {
+             ErrorMessage = msg;
+         } 
+        public YaRequiredAttribute () 
+        {
+            this.ErrorMessage = Startup.GlobalLocalizer["RequiredField"];
+            
+        }
+        public override bool IsValid(object value) {
+            if (value == null) {
+                return false;
+            }
+
+            // only check string length if empty strings are not allowed
+            var stringValue = value as string;
+            if (stringValue != null && !AllowEmptyStrings) {
+                return stringValue.Trim().Length != 0;
+            }
+
+            return true;
+        }
+    }
+    public class YaRegularExpression : System.ComponentModel.DataAnnotations.RegularExpressionAttribute { 
+        public YaRegularExpression(string pattern): base (pattern)
+        {
+            this.ErrorMessage = pattern;
+        }
+        public override string FormatErrorMessage(string name)
+        {
+            return Startup.GlobalLocalizer[name];
+        }
+    }
+}
\ No newline at end of file
diff --git a/Yavsc/Controllers/AccountController.cs b/Yavsc/Controllers/AccountController.cs
index 68ed1cc5..0cadcc73 100644
--- a/Yavsc/Controllers/AccountController.cs
+++ b/Yavsc/Controllers/AccountController.cs
@@ -626,7 +626,7 @@ namespace Yavsc.Controllers
         {
             foreach (var error in result.Errors)
             {
-                ModelState.AddModelError(string.Empty, error.Description);
+                ModelState.AddModelError(string.Empty, _localizer[ error.Code ]);
             }
         }
 
diff --git a/Yavsc/Resources/Yavsc.Resources.YavscLocalisation.en.resx b/Yavsc/Resources/Yavsc.Resources.YavscLocalisation.en.resx
index 898df4d7..91d34787 100644
--- a/Yavsc/Resources/Yavsc.Resources.YavscLocalisation.en.resx
+++ b/Yavsc/Resources/Yavsc.Resources.YavscLocalisation.en.resx
@@ -341,4 +341,10 @@ contact a performer</value></data>
   <data name="Longueur de cheveux"><value>Hair Length</value></data>
   <data name="Français"><value>French</value></data>
   <data name="Anglais"><value>English</value></data>
+    <data name="RequiredField"><value>This field is required.</value></data>
+    <data name="PasswordTooShort"><value>Passwords must be at least {0} characters.</value></data>
+  <data name="PasswordRequiresNonLetterAndDigit"><value>Passwords must have at least one non letter and non digit character.</value></data>
+  <data name="PasswordRequiresDigit"><value>Passwords must have at least one digit ('0'-'9').</value></data>
+  <data name="PasswordRequiresUpper"><value>Passwords must have at least one uppercase ('A'-'Z').</value></data>
+  
 </root>
diff --git a/Yavsc/Resources/Yavsc.Resources.YavscLocalisation.fr.resx b/Yavsc/Resources/Yavsc.Resources.YavscLocalisation.fr.resx
index 21aabd52..3fcddb02 100644
--- a/Yavsc/Resources/Yavsc.Resources.YavscLocalisation.fr.resx
+++ b/Yavsc/Resources/Yavsc.Resources.YavscLocalisation.fr.resx
@@ -437,4 +437,13 @@
   <data name="UnsetActivity"><value>Supprimer mon profil professionel</value></data>
   <data name="Français"><value>Français</value></data>
   <data name="Anglais"><value>Anglais</value></data>
+  <data name="invalidUserName"><value>Nom d'utilisateur invalide.
+  Les valides sont: le souligné '_', le titret '-', de 'a' à 'z', de 'A' à 'Z', de 0 à 9, l'espace et le point.</value></data>
+  <data name="RequiredField"><value>Ce champ est obligatoire.</value></data>
+  <data name="validationError"><value>Champ invalide ...</value></data>
+  <data name="PasswordTooShort"><value>Le Mot de passe doit contenir au moins 6 caractères.</value></data>
+  <data name="PasswordRequiresNonLetterAndDigit"><value>Mot de passe doit contenir au moins a caractère spécial (ni un chiffre, ni une lettre).</value></data>
+  <data name="PasswordRequiresDigit"><value>Les mots de passe doivent contenir au moins un chiffre ('0' à '9').</value></data>
+  <data name="PasswordRequiresUpper"><value>Les mots de passe doivent contenir au moins une lettre majuscule ('A' à 'Z').</value></data>
+  
 </root>
diff --git a/Yavsc/ViewModels/Account/RegisterViewModel.cs b/Yavsc/ViewModels/Account/RegisterViewModel.cs
index c890f224..a5cfdad6 100644
--- a/Yavsc/ViewModels/Account/RegisterViewModel.cs
+++ b/Yavsc/ViewModels/Account/RegisterViewModel.cs
@@ -1,24 +1,32 @@
 using System.ComponentModel.DataAnnotations;
+using Yavsc.Attributes.Validation;
 
 namespace Yavsc.ViewModels.Account
 {
     public class RegisterViewModel
     {
-        [Required][Display(Name = "Nom d'utilisateur")]
+        // ErrorMessage = "",
+         
+
+        [Display(Name = "Nom d'utilisateur")]
+        [StringLength(102)]
+        [YaRegularExpression(@"[a-zA-Z0-9 ._-]+",
+         ErrorMessage = "Caratères autorisés: lettres, chiffres, espace point tiret et souligné.")]
         public string UserName { get; set; }
 
-        [Required]
-        [EmailAddress]
+        [YaRequired("Ce champ est requis.")]
+   //    [EmailAddress]
         [Display(Name = "Email")]
         public string Email { get; set; }
 
-        [Required]
-        [StringLength(100, ErrorMessage = "Le {0} doit être long d'au moins {2} caractères.", MinimumLength = 6)]
-        [DataType(DataType.Password, ErrorMessage="Les mots de passe doivent contenir au moins un caractère spécial, qui ne soit ni une lettre ni un chiffre.")]
+       [YaRequired(ErrorMessage="Spécifiez un mot de passe.")]
+      //  [StringLength(100, ErrorMessage = "Le {0} doit être long d'au moins {1} caractères.", MinimumLength = 6)]
+        [DataType(DataType.Password,
+         ErrorMessage = "Les mots de passe doivent contenir au moins un caractère spécial, qui ne soit ni une lettre ni un chiffre.")]
+        
         [Display(Name = "Mot de passe")]
         public string Password { get; set; }
 
-        [DataType(DataType.Password)]
         [Display(Name = "Confirmer le mot de passe")]
         [Compare("Password", ErrorMessage = "Le mot de passe et sa confirmation ne sont pas les mêmes.")]
         public string ConfirmPassword { get; set; }
diff --git a/Yavsc/Views/Account/Register.cshtml b/Yavsc/Views/Account/Register.cshtml
index 4c988da2..0e45b3f6 100755
--- a/Yavsc/Views/Account/Register.cshtml
+++ b/Yavsc/Views/Account/Register.cshtml
@@ -17,14 +17,14 @@
     <div class="form-group">
         <label asp-for="UserName" class="col-md-2 control-label"></label>
         <div class="col-md-10">
-            <input asp-for="UserName" class="form-control" placeholder="Your Name" required/>
+            <input asp-for="UserName" class="form-control" placeholder="Your Name" />
             <span asp-validation-for="UserName" class="text-danger"></span>
         </div>
     </div>
     <div class="form-group">
         <label asp-for="Email" class="col-md-2 control-label"></label>
         <div class="col-md-10">
-            <input asp-for="Email" class="form-control" placeholder="Your@@email" required/>
+            <input asp-for="Email" class="form-control" placeholder="Your@@email" />
             <span asp-validation-for="Email" class="text-danger"></span>
         </div>
     </div>
diff --git a/Yavsc/Views/Account/Register.fr.cshtml b/Yavsc/Views/Account/Register.fr.cshtml
new file mode 100755
index 00000000..c7eb480a
--- /dev/null
+++ b/Yavsc/Views/Account/Register.fr.cshtml
@@ -0,0 +1,54 @@
+@model RegisterViewModel
+@{
+    ViewData["Title"] = @SR["Register"];
+}
+
+@section header{
+    <script src="~/lib/jquery-validation/jquery.validate.js"></script>
+    <script src="~/lib/jquery-validation-unobtrusive/jquery.validate.unobtrusive.js"></script>
+}
+
+<h2>@ViewData["Title"].</h2>
+
+<form asp-controller="Account" asp-action="Register" data-toggle="validator" method="post" class="form-horizontal" role="form">
+    <h4>@SR["Create a new account"].</h4>
+    <hr />
+    <div asp-validation-summary="ValidationSummary.All" class="text-danger"></div>
+    <div class="form-group">
+        <label asp-for="UserName" class="col-md-2 control-label"></label>
+        <div class="col-md-10">
+            <input asp-for="UserName" class="form-control" placeholder="Votre nom"/>
+            <span asp-validation-for="UserName" class="text-danger"></span>
+        </div>
+    </div>
+    <div class="form-group">
+        <label asp-for="Email" class="col-md-2 control-label"></label>
+        <div class="col-md-10">
+            <input asp-for="Email" class="form-control" placeholder="votre@@email" />
+            <span asp-validation-for="Email" class="text-danger"></span>
+        </div>
+    </div>
+    <div class="form-group">
+        <label asp-for="Password" class="col-md-2 control-label"></label>
+        <div class="col-md-10">
+            <input asp-for="Password" class="form-control" />
+            <span asp-validation-for="Password" class="text-danger"></span>
+        </div>
+    </div>
+    <div class="form-group">
+        <label asp-for="ConfirmPassword" class="col-md-2 control-label"></label>
+        <div class="col-md-10">
+            <input asp-for="ConfirmPassword" class="form-control" />
+            <span asp-validation-for="ConfirmPassword" class="text-danger"></span>
+        </div>
+    </div>
+    <div class="form-group">
+        <div class="col-md-offset-2 col-md-10">
+            <button type="submit" class="btn btn-default">@SR["Register"]</button>
+        </div>
+    </div>
+</form>
+
+@section Scripts {
+    @{ await Html.RenderPartialAsync("_ValidationScriptsPartial"); }
+}
diff --git a/Yavsc/Views/Shared/_Layout.cshtml b/Yavsc/Views/Shared/_Layout.cshtml
index e6215c29..97ed6c6d 100755
--- a/Yavsc/Views/Shared/_Layout.cshtml
+++ b/Yavsc/Views/Shared/_Layout.cshtml
@@ -100,8 +100,6 @@ h6 {
                             </ul>
                         </li>
                     </ul>
-           
-
                     @await Html.PartialAsync("_LoginPartial")
                 </div>
             </div>
@@ -112,8 +110,7 @@ h6 {
     <h2 markdown="@n.title"></h2>
     <a class="close" data-dismiss="alert" aria-label="close" onclick="notifClick(@n.Id)">@((n.click_action==null)?SR["Fermer"]:SR[n.click_action])</a>
     <markdown>@n.body</markdown>
-    </div>
-            }
+    </div>}
         }
         @RenderSection("subbanner", required: false)
         <main class="container body-content" role="main">