diff --git a/src/pretix/base/payment.py b/src/pretix/base/payment.py
index 03a01ce2d4..e709b570eb 100644
--- a/src/pretix/base/payment.py
+++ b/src/pretix/base/payment.py
@@ -306,7 +306,7 @@ class BasePaymentProvider:
                  initial=['web'],
                  widget=forms.CheckboxSelectMultiple,
                  help_text=_(
-                     'Only allow the usage of this payment provider in the following sales channels'),
+                     'Only allow the usage of this payment provider in the selected sales channels.'),
              )),
             ('_hidden',
              forms.BooleanField(
@@ -902,7 +902,7 @@ class ManualPayment(BasePaymentProvider):
                     label=_('Payment process description in order confirmation emails'),
                     help_text=_('This text will be included for the {payment_info} placeholder in order confirmation '
                                 'mails. It should instruct the user on how to proceed with the payment. You can use '
-                                'the placeholders {order}, {total}, {currency} and {total_with_currency}'),
+                                'the placeholders {order}, {total}, {currency} and {total_with_currency}.'),
                     widget=I18nTextarea,
                     validators=[PlaceholderValidator(['{order}', '{total}', '{currency}', '{total_with_currency}'])],
                 )),
@@ -910,7 +910,7 @@ class ManualPayment(BasePaymentProvider):
                     label=_('Payment process description for pending orders'),
                     help_text=_('This text will be shown on the order confirmation page for pending orders. '
                                 'It should instruct the user on how to proceed with the payment. You can use '
-                                'the placeholders {order}, {total}, {currency} and {total_with_currency}'),
+                                'the placeholders {order}, {total}, {currency} and {total_with_currency}.'),
                     widget=I18nTextarea,
                     validators=[PlaceholderValidator(['{order}', '{total}', '{currency}', '{total_with_currency}'])],
                 )),
@@ -1199,7 +1199,7 @@ class GiftCardPayment(BasePaymentProvider):
             if not gc.accepted_by(self.event.organizer):  # noqa - just a safeguard
                 raise PaymentException(_("This gift card is not accepted by this event organizer."))
             if payment.amount > gc.value:  # noqa - just a safeguard
-                raise PaymentException(_("This gift card was used in the meantime. Please try again"))
+                raise PaymentException(_("This gift card was used in the meantime. Please try again."))
             if gc.expires and gc.expires < now():  # noqa - just a safeguard
                 messages.error(request, _("This gift card is no longer valid."))
                 return
diff --git a/src/pretix/base/settings.py b/src/pretix/base/settings.py
index ad94d981eb..258ae58ac7 100644
--- a/src/pretix/base/settings.py
+++ b/src/pretix/base/settings.py
@@ -52,7 +52,7 @@ DEFAULTS = {
         'form_kwargs': dict(
             label=_("Show net prices instead of gross prices in the product list (not recommended!)"),
             help_text=_("Independent of your choice, the cart will show gross prices as this is the price that needs to be "
-                        "paid"),
+                        "paid."),
 
         )
     },
diff --git a/src/pretix/control/forms/item.py b/src/pretix/control/forms/item.py
index 56fd22f278..15108af61a 100644
--- a/src/pretix/control/forms/item.py
+++ b/src/pretix/control/forms/item.py
@@ -704,7 +704,7 @@ class ItemBundleFormSet(I18nFormSet):
 
             if 'itemvar' in form.cleaned_data:
                 if form.cleaned_data['itemvar'] in ivs:
-                    raise ValidationError(_('You added the same bundled product twice'))
+                    raise ValidationError(_('You added the same bundled product twice.'))
 
                 ivs.add(form.cleaned_data['itemvar'])
 
diff --git a/src/pretix/plugins/banktransfer/__init__.py b/src/pretix/plugins/banktransfer/__init__.py
index c93867e136..b79c4ace1d 100644
--- a/src/pretix/plugins/banktransfer/__init__.py
+++ b/src/pretix/plugins/banktransfer/__init__.py
@@ -15,7 +15,7 @@ class BankTransferApp(AppConfig):
         category = 'PAYMENT'
         version = version
         description = _("This plugin allows you to receive payments " +
-                        "via bank transfer ")
+                        "via bank transfer.")
 
     def ready(self):
         from . import signals  # NOQA