Send noticications by default using the language set in settings

models.py

diff --git a/notification/models.py b/notification/models.py
index f449047..1b50ba5 100644
--- a/notification/models.py
+++ b/notification/models.py
@@ -293,6 +293,8 @@ def send_now(users, label, extra_context=None, on_site=True, sender=None):
         if language is not None:
             # activate the user's language
             activate(language)
+        else:
+            activate(settings.LANGUAGE_CODE)
 
         # update context with user specific translations
         context = Context({