diff --git a/CHANGELOG.md b/CHANGELOG.md
index dcf03168..f390ba09 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -121,7 +121,7 @@ in their own Payment models.
 
 To have a closer look on how the payments works, please go to the wiki.
 
-## MR xxx: Add role models
+## MR 182: Add role models
 
 Adds the Role model.
 You need to ensure that your database character set is utf-8.
diff --git a/machines/forms.py b/machines/forms.py
index c8584d30..ecffcc71 100644
--- a/machines/forms.py
+++ b/machines/forms.py
@@ -37,6 +37,7 @@ from __future__ import unicode_literals
 
 from django.forms import ModelForm, Form
 from django import forms
+from django.utils.translation import ugettext_lazy as _l
 
 from re2o.field_permissions import FieldPermissionFormMixin
 from re2o.mixins import FormRevMixin
@@ -499,7 +500,7 @@ class DelNasForm(FormRevMixin, Form):
 
 
 class RoleForm(FormRevMixin, ModelForm):
-    """Ajout et edition d'un role"""
+    """Add and edit role."""
     class Meta:
         model = Role
         fields = '__all__'
@@ -514,10 +515,10 @@ class RoleForm(FormRevMixin, ModelForm):
 
 
 class DelRoleForm(FormRevMixin, Form):
-    """Suppression d'un ou plusieurs service"""
+    """Deletion of one or several roles."""
     role = forms.ModelMultipleChoiceField(
         queryset=Role.objects.none(),
-        label="Roles actuels",
+        label=_l("Current roles"),
         widget=forms.CheckboxSelectMultiple
     )
 
@@ -527,9 +528,7 @@ class DelRoleForm(FormRevMixin, Form):
         if instances:
             self.fields['role'].queryset = instances
         else:
-            self.fields['role'].queryset = role.objects.all()
-
-
+            self.fields['role'].queryset = Role.objects.all()
 
 
 class ServiceForm(FormRevMixin, ModelForm):
diff --git a/machines/models.py b/machines/models.py
index 2f401301..6ce84adb 100644
--- a/machines/models.py
+++ b/machines/models.py
@@ -42,6 +42,7 @@ from django.forms import ValidationError
 from django.utils.functional import cached_property
 from django.utils import timezone
 from django.core.validators import MaxValueValidator
+from django.utils.translation import ugettext_lazy as _l
 
 from macaddress.fields import MACAddressField
 
@@ -158,7 +159,7 @@ class Machine(RevMixin, FieldPermissionModelMixin, models.Model):
                         user_request,
                         *args,
                         **kwargs
-                    )[0]):
+            )[0]):
                 return False, (u"Vous ne pouvez pas éditer une machine "
                                "d'un autre user que vous sans droit")
         return True, None
@@ -176,7 +177,7 @@ class Machine(RevMixin, FieldPermissionModelMixin, models.Model):
                         user_request,
                         *args,
                         **kwargs
-                    )[0]):
+            )[0]):
                 return False, (u"Vous ne pouvez pas éditer une machine "
                                "d'un autre user que vous sans droit")
         return True, None
@@ -338,10 +339,10 @@ class IpType(RevMixin, AclMixin, models.Model):
             return
         else:
             for ipv6 in Ipv6List.objects.filter(
-                    interface__in=Interface.objects.filter(
-                        type__in=MachineType.objects.filter(ip_type=self)
-                    )
-                ):
+                interface__in=Interface.objects.filter(
+                    type__in=MachineType.objects.filter(ip_type=self)
+                )
+            ):
                 ipv6.check_and_replace_prefix(prefix=self.prefix_v6)
 
     def clean(self):
@@ -713,7 +714,7 @@ class Srv(RevMixin, AclMixin, models.Model):
         choices=(
             (TCP, 'TCP'),
             (UDP, 'UDP'),
-            ),
+        ),
         default=TCP,
     )
     extension = models.ForeignKey('Extension', on_delete=models.PROTECT)
@@ -1047,7 +1048,7 @@ class Interface(RevMixin, AclMixin, FieldPermissionModelMixin, models.Model):
                         user_request,
                         *args,
                         **kwargs
-                    )[0]):
+            )[0]):
                 return False, (u"Vous ne pouvez pas éditer une machine "
                                "d'un autre user que vous sans droit")
         return True, None
@@ -1064,7 +1065,7 @@ class Interface(RevMixin, AclMixin, FieldPermissionModelMixin, models.Model):
                         user_request,
                         *args,
                         **kwargs
-                    )[0]):
+            )[0]):
                 return False, (u"Vous ne pouvez pas éditer une machine "
                                "d'un autre user que vous sans droit")
         return True, None
@@ -1165,7 +1166,7 @@ class Ipv6List(RevMixin, AclMixin, FieldPermissionModelMixin, models.Model):
                         user_request,
                         *args,
                         **kwargs
-                    )[0]):
+            )[0]):
                 return False, (u"Vous ne pouvez pas éditer une machine "
                                "d'un autre user que vous sans droit")
         return True, None
@@ -1182,7 +1183,7 @@ class Ipv6List(RevMixin, AclMixin, FieldPermissionModelMixin, models.Model):
                         user_request,
                         *args,
                         **kwargs
-                    )[0]):
+            )[0]):
                 return False, (u"Vous ne pouvez pas éditer une machine "
                                "d'un autre user que vous sans droit")
         return True, None
@@ -1358,11 +1359,11 @@ class Domain(RevMixin, AclMixin, models.Model):
                 return False, (u"Vous ne pouvez pas ajouter un alias à une "
                                "machine d'un autre user que vous sans droit")
             if Domain.objects.filter(
-                    cname__in=Domain.objects.filter(
-                        interface_parent__in=(interface.machine.user
-                                              .user_interfaces())
-                    )
-                ).count() >= max_lambdauser_aliases:
+                cname__in=Domain.objects.filter(
+                    interface_parent__in=(interface.machine.user
+                                          .user_interfaces())
+                )
+            ).count() >= max_lambdauser_aliases:
                 return False, (u"Vous avez atteint le maximum d'alias "
                                "autorisés que vous pouvez créer vous même "
                                "(%s) " % max_lambdauser_aliases)
@@ -1441,27 +1442,25 @@ class IpList(RevMixin, AclMixin, models.Model):
         return self.ipv4
 
 
-
 class Role(RevMixin, AclMixin, models.Model):
-    """ Definition d'un role (routeur principal, routeur de backkup)"""
-    """ Sert à la génération automatique de la conf des serveurs"""
-    PRETTY_NAME = "Roles des serveurs"
+    """Define the role of a machine.
+    Allow automated generation of the server configuration.
+    """
 
     ROLE = (
-        ('dhcp-server', 'dhcp-server'),
-        ('switch-conf-server', 'switch-conf-server'),
-        ('dns-recursif-server', 'dns-recursif-server'),
-        ('ntp-server', 'ntp-server'),
-        ('radius-server', 'radius-server'),
-        ('ntp-server', 'ntp-server'),
-        ('log-server', 'log-server'),
-        ('ldap-master-server', 'ldap-master-server'),
-        ('ldap-backup-server', 'ldap-backup-server'),
-        ('smtp-server', 'smtp-server'),
-        ('postgresql-server', 'postgresql-server'),
-        ('mysql-server', 'mysql-server'),
-        ('sql-client', 'sql-client'),
-        ('gateway', 'gateway'),
+        ('dhcp-server', _l('DHCP server')),
+        ('switch-conf-server', _l('Switches configuration server')),
+        ('dns-recursif-server', _l('Recursive DNS server')),
+        ('ntp-server', _l('NTP server')),
+        ('radius-server', _l('Radius server')),
+        ('log-server', _l('Log server')),
+        ('ldap-master-server', _l('LDAP master server')),
+        ('ldap-backup-server', _l('LDAP backup server')),
+        ('smtp-server', _l('SMTP server')),
+        ('postgresql-server', _l('postgreSQL server')),
+        ('mysql-server', _l('mySQL server')),
+        ('sql-client', _l('SQL client')),
+        ('gateway', _l('Gatewaw')),
     )
 
     role_type = models.CharField(max_length=255, unique=True)
@@ -1475,21 +1474,28 @@ class Role(RevMixin, AclMixin, models.Model):
 
     class Meta:
         permissions = (
-            ("view_role", "Peut voir un objet service"),
+            ("view_role", _l("Can view a role.")),
         )
+        verbose_name = _l("Server role")
 
     @classmethod
-    def get_instance(cls, machineid, *_args, **_kwargs):
-        """Get the Machine instance with machineid.
-        :param userid: The id
-        :return: The user
+    def get_instance(cls, roleid, *_args, **_kwargs):
+        """Get the Role instance with roleid.
+
+        Args:
+            roleid: The id
+
+        Returns:
+            The role.
         """
-        return cls.objects.get(pk=machineid)
+        return cls.objects.get(pk=roleid)
 
     @classmethod
     def interface_for_roletype(cls, roletype):
         """Return interfaces for a roletype"""
-        return Interface.objects.filter(role=cls.objects.filter(specific_role=roletype))
+        return Interface.objects.filter(
+            role=cls.objects.filter(specific_role=roletype)
+        )
 
     def save(self, *args, **kwargs):
         super(Role, self).save(*args, **kwargs)
@@ -1497,6 +1503,7 @@ class Role(RevMixin, AclMixin, models.Model):
     def __str__(self):
         return str(self.role_type)
 
+
 class Service(RevMixin, AclMixin, models.Model):
     """ Definition d'un service (dhcp, dns, etc)"""
     PRETTY_NAME = "Services à générer (dhcp, dns, etc)"
@@ -1527,8 +1534,8 @@ class Service(RevMixin, AclMixin, models.Model):
         """ Django ne peut créer lui meme les relations manytomany avec table
         intermediaire explicite"""
         for serv in servers.exclude(
-                pk__in=Interface.objects.filter(service=self)
-            ):
+            pk__in=Interface.objects.filter(service=self)
+        ):
             link = Service_link(service=self, server=serv)
             link.save()
         Service_link.objects.filter(service=self).exclude(server__in=servers)\
@@ -1686,7 +1693,7 @@ class OuverturePort(RevMixin, AclMixin, models.Model):
         choices=(
             (TCP, 'TCP'),
             (UDP, 'UDP'),
-            ),
+        ),
         default=TCP,
     )
     io = models.CharField(
@@ -1694,7 +1701,7 @@ class OuverturePort(RevMixin, AclMixin, models.Model):
         choices=(
             (IN, 'IN'),
             (OUT, 'OUT'),
-            ),
+        ),
         default=OUT,
     )
 
diff --git a/machines/templates/machines/aff_role.html b/machines/templates/machines/aff_role.html
index 691cc0c2..f83a4adb 100644
--- a/machines/templates/machines/aff_role.html
+++ b/machines/templates/machines/aff_role.html
@@ -23,29 +23,31 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 {% endcomment %}
 
 {% load acl %}
+{% load i18n %}
 
-    <table class="table table-striped">
-        <thead>
-            <tr>
-                <th>Nom du role</th>
-		<th>Role spécifique</th>
-                <th>Serveurs inclus</th>
-		<th></th>
-                <th></th>
-            </tr>
-        </thead>
-        {% for role in role_list %}
+
+<table class="table table-striped">
+    <thead>
         <tr>
-            <td>{{ role.role_type }}</td>
-	    <td>{{ role.specific_role }}</td>
-	    <td>{% for serv in role.servers.all %}{{ serv }}, {% endfor %}</td>
-            <td class="text-right">
-		{% can_edit role %}
-                {% include 'buttons/edit.html' with href='machines:edit-role' id=role.id %}
-		{% acl_end %}
-                {% include 'buttons/history.html' with href='machines:history' name='role' id=role.id %}
-            </td>
+            <th>{% trans "Role name" %}</th>
+            <th>{% trans "Specific role" %}</th>
+            <th>{% trans "Servers" %}</th>
+            <th></th>
+            <th></th>
         </tr>
-        {% endfor %}
-    </table>
+    </thead>
+    {% for role in role_list %}
+    <tr>
+        <td>{{ role.role_type }}</td>
+        <td>{{ role.specific_role }}</td>
+        <td>{% for serv in role.servers.all %}{{ serv }}, {% endfor %}</td>
+        <td class="text-right">
+        {% can_edit role %}
+            {% include 'buttons/edit.html' with href='machines:edit-role' id=role.id %}
+        {% acl_end %}
+            {% include 'buttons/history.html' with href='machines:history' name='role' id=role.id %}
+        </td>
+    </tr>
+    {% endfor %}
+</table>
 
diff --git a/machines/views.py b/machines/views.py
index 134560ba..975cac08 100644
--- a/machines/views.py
+++ b/machines/views.py
@@ -40,6 +40,7 @@ from django.contrib.auth.decorators import login_required, permission_required
 from django.db.models import ProtectedError, F
 from django.forms import modelformset_factory
 from django.views.decorators.csrf import csrf_exempt
+from django.utils.translation import ugettext as _
 
 from rest_framework.renderers import JSONRenderer
 
@@ -181,14 +182,14 @@ def generate_ipv4_engine(is_type_tt):
     """
     return (
         'new Bloodhound( {{'
-            'datumTokenizer: Bloodhound.tokenizers.obj.whitespace( "value" ),'
-            'queryTokenizer: Bloodhound.tokenizers.whitespace,'
-            'local: choices_ipv4[ $( "#{type_id}" ).val() ],'
-            'identify: function( obj ) {{ return obj.key; }}'
+        'datumTokenizer: Bloodhound.tokenizers.obj.whitespace( "value" ),'
+        'queryTokenizer: Bloodhound.tokenizers.whitespace,'
+        'local: choices_ipv4[ $( "#{type_id}" ).val() ],'
+        'identify: function( obj ) {{ return obj.key; }}'
         '}} )'
-        ).format(
-            type_id=f_type_id(is_type_tt)
-        )
+    ).format(
+        type_id=f_type_id(is_type_tt)
+    )
 
 
 def generate_ipv4_match_func(is_type_tt):
@@ -196,17 +197,17 @@ def generate_ipv4_match_func(is_type_tt):
     """
     return (
         'function(q, sync) {{'
-            'if (q === "") {{'
-                'var first = choices_ipv4[$("#{type_id}").val()].slice(0, 5);'
-                'first = first.map( function (obj) {{ return obj.key; }} );'
-                'sync(engine_ipv4.get(first));'
-            '}} else {{'
-                'engine_ipv4.search(q, sync);'
-            '}}'
+        'if (q === "") {{'
+        'var first = choices_ipv4[$("#{type_id}").val()].slice(0, 5);'
+        'first = first.map( function (obj) {{ return obj.key; }} );'
+        'sync(engine_ipv4.get(first));'
+        '}} else {{'
+        'engine_ipv4.search(q, sync);'
         '}}'
-        ).format(
-            type_id=f_type_id(is_type_tt)
-        )
+        '}}'
+    ).format(
+        type_id=f_type_id(is_type_tt)
+    )
 
 
 def generate_ipv4_mbf_param(form_obj, is_type_tt):
@@ -1168,10 +1169,10 @@ def edit_role(request, role_instance, **_kwargs):
     if role.is_valid():
         if role.changed_data:
             role.save()
-            messages.success(request, "Role modifié")
+            messages.success(request, _("Role updated"))
         return redirect(reverse('machines:index-role'))
     return form(
-        {'roleform': role, 'action_name': 'Editer'},
+        {'roleform': role, 'action_name': _('Edit')},
         'machines/machine.html',
         request
     )
@@ -1187,22 +1188,22 @@ def del_role(request, instances):
         for role_del in role_dels:
             try:
                 role_del.delete()
-                messages.success(request, "Le role a été supprimée")
+                messages.success(request, _("The role has been deleted."))
             except ProtectedError:
                 messages.error(
                     request,
-                    ("Erreur le role suivant %s ne peut être supprimé"
-                     % role_del)
+                    (_("Error: The following role cannot be deleted: %(role)")
+                        % {'role': role_del}
+                     )
                 )
         return redirect(reverse('machines:index-role'))
     return form(
-        {'roleform': role, 'action_name': 'Supprimer'},
+        {'roleform': role, 'action_name': _('Delete')},
         'machines/machine.html',
         request
     )
 
 
-
 @login_required
 @can_create(Service)
 def add_service(request):
@@ -1548,9 +1549,9 @@ def index_ipv6(request, interface, interfaceid):
 def index_role(request):
     """ View used to display the list of existing roles """
     role_list = (Role.objects
-                    .prefetch_related(
-                        'servers__domain__extension'
-                    ).all())
+                 .prefetch_related(
+                     'servers__domain__extension'
+                 ).all())
     return render(
         request,
         'machines/index_role.html',
@@ -1647,12 +1648,12 @@ def add_portlist(request):
     """ View used to add a port policy """
     port_list = EditOuverturePortListForm(request.POST or None)
     port_formset = modelformset_factory(
-            OuverturePort,
-            fields=('begin', 'end', 'protocole', 'io'),
-            extra=0,
-            can_delete=True,
-            min_num=1,
-            validate_min=True,
+        OuverturePort,
+        fields=('begin', 'end', 'protocole', 'io'),
+        extra=0,
+        can_delete=True,
+        min_num=1,
+        validate_min=True,
     )(request.POST or None, queryset=OuverturePort.objects.none())
     if port_list.is_valid() and port_formset.is_valid():
         pl = port_list.save()
@@ -1699,11 +1700,12 @@ def configure_ports(request, interface_instance, **_kwargs):
     )
 
 
-## Framework Rest
+# Framework Rest
 
 
 class JSONResponse(HttpResponse):
     """ Class to build a JSON response. Used for API """
+
     def __init__(self, data, **kwargs):
         content = JSONRenderer().render(data)
         kwargs['content_type'] = 'application/json'