Fix translations and pluralisation within CopyForm

wagtail/wagtailadmin/forms.py

@@ -2,7 +2,7 @@ from django import forms
 from django.contrib.auth import get_user_model
 from django.contrib.auth.forms import AuthenticationForm, PasswordResetForm
 from django.utils.translation import ugettext as _
-from django.utils.translation import ugettext_lazy
+from django.utils.translation import ungettext, ugettext_lazy
 
 
 class SearchForm(forms.Form):
@@ -85,25 +85,32 @@ class CopyForm(forms.Form):
         can_publish = kwargs.pop('can_publish')
         super(CopyForm, self).__init__(*args, **kwargs)
 
-        self.fields['new_title'] = forms.CharField(initial=self.page.title)
-        self.fields['new_slug'] = forms.SlugField(initial=self.page.slug)
+        self.fields['new_title'] = forms.CharField(initial=self.page.title, label=_("New title"))
+        self.fields['new_slug'] = forms.SlugField(initial=self.page.slug, label=_("New slug"))
 
         pages_to_copy = self.page.get_descendants(inclusive=True)
         subpage_count = pages_to_copy.count() - 1
         if subpage_count > 0:
-            self.fields['copy_subpages'] = forms.BooleanField(required=False, initial=True,
-                help_text=_("This will copy %(count)s subpages.") % {'count': subpage_count})
+            self.fields['copy_subpages'] = forms.BooleanField(
+                required=False, initial=True, label=_("Copy subpages"),
+                help_text=ungettext(
+                    "This will copy %(count)s subpage.",
+                    "This will copy %(count)s subpages.",
+                subpage_count) % {'count': subpage_count})
 
         if can_publish:
             pages_to_publish_count = pages_to_copy.live().count()
             if pages_to_publish_count > 0:
                 # In the specific case that there are no subpages, customise the field label and help text
                 if subpage_count == 0:
-                    label = 'Publish copied page'
+                    label = _("Publish copied page")
                     help_text = _("This page is live. Would you like to publish its copy as well?")
                 else:
-                    label = 'Publish copies'
-                    help_text = _("%(count)s of the pages being copied are live. Would you like to publish their copies?") % {'count': pages_to_publish_count}
+                    label = _("Publish copies")
+                    help_text = ungettext(
+                        "%(count)s of the pages being copied is live. Would you like to publish its copy?",
+                        "%(count)s of the pages being copied are live. Would you like to publish their copies?",
+                    pages_to_publish_count) % {'count': pages_to_publish_count}
 
                 self.fields['publish_copies'] = forms.BooleanField(
                     required=False, initial=True, label=label, help_text=help_text