diff --git a/greenmine/base/models.py b/greenmine/base/models.py
index ba6459f1..7c47899b 100644
--- a/greenmine/base/models.py
+++ b/greenmine/base/models.py
@@ -69,7 +69,7 @@ class Role(models.Model):
     slug = models.SlugField(max_length=250, unique=True, null=False, blank=True,
                 verbose_name=_('slug'))
     permissions = models.ManyToManyField('auth.Permission',
-                related_name='roles')
+                related_name='roles',
                 verbose_name=_('permissions'))
 
     class Meta:
diff --git a/greenmine/documents/models.py b/greenmine/documents/models.py
index d035ebf0..4a557c7a 100644
--- a/greenmine/documents/models.py
+++ b/greenmine/documents/models.py
@@ -1,5 +1,6 @@
 # -* coding: utf-8 -*-
 from django.db import models
+from django.utils.translation import ugettext_lazy as _
 
 from greenmine.base.utils.slug import slugify_uniquely as slugify
 from greenmine.base.fields import DictField
diff --git a/greenmine/questions/models.py b/greenmine/questions/models.py
index 17a5ebf5..dd1d8c25 100644
--- a/greenmine/questions/models.py
+++ b/greenmine/questions/models.py
@@ -1,4 +1,5 @@
 from django.db import models
+from django.utils.translation import ugettext_lazy as _
 
 from greenmine.base.utils.slug import slugify_uniquely
 from greenmine.base.fields import DictField
diff --git a/greenmine/scrum/models.py b/greenmine/scrum/models.py
index e61f8cac..142f9301 100644
--- a/greenmine/scrum/models.py
+++ b/greenmine/scrum/models.py
@@ -5,6 +5,7 @@ from django.utils import timezone
 from django.dispatch import receiver
 from django.contrib.contenttypes.models import ContentType
 from django.contrib.contenttypes import generic
+from django.utils.translation import ugettext_lazy as _
 
 from picklefield.fields import PickledObjectField
 
@@ -247,7 +248,7 @@ class Milestone(models.Model):
                 verbose_name=_('is closed'))
     disponibility = models.FloatField(default=0.0, null=True, blank=True,
                 verbose_name=_('disponibility'))
-    order = models.PositiveSmallIntegerField('Order', default=1, null=False, blank=False,
+    order = models.PositiveSmallIntegerField(default=1, null=False, blank=False,
                 verbose_name=_('order'))
 
     class Meta:
diff --git a/greenmine/wiki/models.py b/greenmine/wiki/models.py
index e22923fd..f468440e 100644
--- a/greenmine/wiki/models.py
+++ b/greenmine/wiki/models.py
@@ -1,4 +1,5 @@
 from django.db import models
+from django.utils.translation import ugettext_lazy as _
 
 from greenmine.base.fields import DictField