diff --git a/electronic_mail_wizard.py b/electronic_mail_wizard.py
index 8ff48d8..2f52989 100644
--- a/electronic_mail_wizard.py
+++ b/electronic_mail_wizard.py
@@ -10,6 +10,8 @@ from trytond.pool import Pool
 from trytond.pyson import Eval
 from trytond.tools import grouped_slice
 from trytond.transaction import Transaction
+from trytond.exceptions import UserError
+from trytond.i18n import gettext
 from trytond.wizard import Wizard, StateTransition, StateView, Button
 
 __all__ = ['TemplateEmailStart', 'TemplateEmailResult',
@@ -78,14 +80,6 @@ class GenerateTemplateEmail(Wizard):
             ])
     send = StateTransition()
 
-    @classmethod
-    def __setup__(cls):
-        super(GenerateTemplateEmail, cls).__setup__()
-        cls._error_messages.update({
-                'template_deleted': (
-                    'This template has been deactivated or deleted.'),
-                })
-
     def default_start(self, fields):
         default = self.render_fields(self.__name__)
         return default
@@ -107,8 +101,10 @@ class GenerateTemplateEmail(Wizard):
         active_ids = context.get('active_ids')
         action_id = context.get('action_id', None)
         wizard = Wizard(action_id)
-        template = (wizard.template[0] if wizard.template
-            else self.raise_user_error('template_deleted'))
+        if not wizard.template:
+            raise UserError(gettext(
+                'electronic_mail_wizard.msg_template_deleted'))
+        template = wizard.template[0]
         total = len(active_ids)
 
         record = pool.get(template.model.model)(active_ids[0])
diff --git a/locale/ca.po b/locale/ca.po
index faad59a..b591c31 100644
--- a/locale/ca.po
+++ b/locale/ca.po
@@ -2,7 +2,7 @@
 msgid ""
 msgstr "Content-Type: text/plain; charset=utf-8\n"
 
-msgctxt "error:electronic_mail_wizard.templateemail:"
+msgctxt "model:ir.message,text:msg_template_deleted"
 msgid "This template has been deactivated or deleted."
 msgstr "Aquesta plantilla s'ha desactivat o eliminat."
 
diff --git a/locale/es.po b/locale/es.po
index 753a8ce..4570d56 100644
--- a/locale/es.po
+++ b/locale/es.po
@@ -2,7 +2,7 @@
 msgid ""
 msgstr "Content-Type: text/plain; charset=utf-8\n"
 
-msgctxt "error:electronic_mail_wizard.templateemail:"
+msgctxt "model:ir.message,text:msg_template_deleted"
 msgid "This template has been deactivated or deleted."
 msgstr "Esta plantilla se ha desactivado o eliminado."
 
diff --git a/message.xml b/message.xml
new file mode 100644
index 0000000..e4451fa
--- /dev/null
+++ b/message.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0"?>
+<!-- The COPYRIGHT file at the top level of this repository contains the full
+     copyright notices and license terms. -->
+<tryton>
+    <data>
+        <record model="ir.message" id="msg_template_deleted">
+            <field name="text">This template has been deactivated or deleted.</field>
+        </record>
+    </data>
+</tryton>
\ No newline at end of file
diff --git a/tryton.cfg b/tryton.cfg
index 0e29433..86c1c1d 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -4,6 +4,8 @@ depends:
     ir
     res
     electronic_mail_template
+
 xml:
     electronic_mail_wizard.xml
     template.xml
+    message.xml
\ No newline at end of file