Fix slugify

apps/collection/models.py

@@ -144,7 +144,10 @@ class Collection(ProjectBaseMixin, CollectionDateMixin,
 
     def save(self, *args, **kwargs):
         if not self.pk:
-            slugify_slug = slugify(self.name, word_boundary=True)
+            slugify_slug = slugify(
+                next(iter(self.name.values())), 
+                word_boundary=True
+            )
             self.slug = slugify_slug
         super(Collection, self).save(*args, **kwargs)