diff --git a/readthedocs/projects/forms.py b/readthedocs/projects/forms.py
index 9bdb8cd6e9d..1816d48498a 100644
--- a/readthedocs/projects/forms.py
+++ b/readthedocs/projects/forms.py
@@ -719,6 +719,8 @@ def get_translation_queryset(self):
             Project.objects.for_admin_user(self.user)
             .filter(main_language_project=None)
             .exclude(pk=self.parent.pk)
+            .exclude(language=self.parent.language)
+            # TODO: exclude languages that are already translations of the parent.
         )
         return queryset