Fix localization of payment reminder email

src/pretix/base/models/orders.py

@@ -387,9 +387,9 @@ class Order(LoggedModel):
         """
         from pretix.base.services.mail import SendMailException, mail, render_mail
 
+        with language(self.locale):
             recipient = self.email
             try:
-            with language(self.locale):
                 email_content = render_mail(template, context)[0]
                 mail(
                     recipient, subject, template, context,

src/pretix/base/services/orders.py

@@ -581,6 +581,7 @@ def send_expiry_warnings(sender, **kwargs):
         days = eventsettings.get('mail_days_order_expire_warning', as_type=int)
         tz = pytz.timezone(eventsettings.get('timezone', settings.TIME_ZONE))
         if days and (o.expires - today).days <= days:
+            with language(o.locale):
                 o.expiry_reminder_sent = True
                 o.save()
                 try: