diff --git a/server/books/models/module.py b/server/books/models/module.py
index abb43d26..d7c105a5 100644
--- a/server/books/models/module.py
+++ b/server/books/models/module.py
@@ -91,6 +91,9 @@ class Module(StrictHierarchyPage):
     parent_page_types = ["books.Topic"]
     subpage_types = ["books.Chapter"]
 
+    def is_translated(self) -> bool:
+        return self.get_translations().count() > 0
+
     # todo: isn't this a duplicate definition?
     def get_child_ids(self):
         return self.get_children().values_list("id", flat=True)
diff --git a/server/books/schema/queries.py b/server/books/schema/queries.py
index 1fbd5c62..64b83e92 100644
--- a/server/books/schema/queries.py
+++ b/server/books/schema/queries.py
@@ -1,10 +1,12 @@
 import graphene
 from graphene import relay
 from graphene_django.filter import DjangoFilterConnectionField
+from wagtail.models import Locale
 
 from api.utils import get_object
 from core.logger import get_logger
 from .connections import TopicConnection, ModuleConnection
+<<<<<<< HEAD
 from .nodes import (
     ContentBlockNode,
     ChapterNode,
@@ -42,7 +44,8 @@ class BookQuery(object):
         return Book.objects.filter(**kwargs).live()
 
     def resolve_topics(self, *args, **kwargs):
-        return Topic.objects.live().filter(locale__language_code="de")
+        default_locale = Locale.get_default()
+        return Topic.objects.live().filter(locale=default_locale)
 
     def resolve_modules(self, *args, **kwargs):
         return Module.objects.filter(**kwargs).live()
@@ -79,7 +82,8 @@ class BookQuery(object):
             return get_object(Topic, id)
         if slug is not None:
             try:
-                return Topic.objects.get(slug=slug, locale__language_code="de")
+                default_locale = Locale.get_default()
+                return Topic.objects.get(slug=slug, locale=default_locale)
             except Topic.DoesNotExist:
                 return NotFoundFailure
         return None
diff --git a/server/core/settings.py b/server/core/settings.py
index 36f5de80..105d0959 100644
--- a/server/core/settings.py
+++ b/server/core/settings.py
@@ -193,7 +193,7 @@ USE_L10N = True
 
 USE_TZ = True
 
-LANGUAGES = [
+WAGTAIL_CONTENT_LANGUAGES = LANGUAGES = [
     ("de", _("German")),
     ("en", _("English")),
     ("fr", _("French")),