diff --git a/server/books/schema/queries.py b/server/books/schema/queries.py
index 656fae43..1fbd5c62 100644
--- a/server/books/schema/queries.py
+++ b/server/books/schema/queries.py
@@ -42,7 +42,7 @@ class BookQuery(object):
         return Book.objects.filter(**kwargs).live()
 
     def resolve_topics(self, *args, **kwargs):
-        return Topic.objects.live()
+        return Topic.objects.live().filter(locale__language_code="de")
 
     def resolve_modules(self, *args, **kwargs):
         return Module.objects.filter(**kwargs).live()
@@ -79,7 +79,7 @@ class BookQuery(object):
             return get_object(Topic, id)
         if slug is not None:
             try:
-                return Topic.objects.get(slug=slug)
+                return Topic.objects.get(slug=slug, locale__language_code="de")
             except Topic.DoesNotExist:
                 return NotFoundFailure
         return None