email_notifications: Fix missing translation tags on sender.

zerver/lib/email_notifications.py

@@ -4,6 +4,8 @@ from zerver.lib.types import DisplayRecipientT
 from confirmation.models import one_click_unsubscribe_link
 from django.conf import settings
 from django.utils.timezone import now as timezone_now
+from django.utils.translation import override as override_language
+from django.utils.translation import ugettext as _
 from django.contrib.auth import get_backends
 
 from zerver.decorator import statsd_increment
@@ -414,7 +416,8 @@ def do_send_missedmessage_events_reply_in_zulip(user_profile: UserProfile,
             'show_message_content': True,
         })
 
-    from_name = "Zulip missed messages"  # type: str
+    with override_language(user_profile.default_language):
+        from_name = _("Zulip missed messages")  # type: str
     from_address = FromAddress.NOREPLY
     if len(senders) == 1 and settings.SEND_MISSED_MESSAGE_EMAILS_AS_USER:
         # If this setting is enabled, you can reply to the Zulip