old_contents: from django import forms
  from django.utils.translation import ugettext as _
  
  class ContactForm(forms.Form):
      email = forms.EmailField(
                  label=_('Email'),
                  widget=forms.TextInput(
                      attrs={
                          'placeholder': _('Your email address')
                          }
                      )
                  )
      phone = forms.CharField(
                  label=_('Phone'),
                  widget=forms.TextInput(
                      attrs={
                          'placeholder': _('+33...')
                          }
                      )
                  )
      comment = forms.CharField(
                  label=_('Comment'),
                  widget=forms.Textarea(
                      attrs={
                          'placeholder': _('Your message'),
                          'rows': 8,
                          'cols': 80
                          }
                      )
                  )
  
      next = forms.CharField(required=False, widget=forms.HiddenInput())
  
  
new_contents: from django import forms
  from django.utils.translation import ugettext_lazy as _
  
  class ContactForm(forms.Form):
      email = forms.EmailField(
                  label=_('Email'),
                  widget=forms.TextInput(
                      attrs={
                          'placeholder': _('Your email address')
                          }
                      )
                  )
      phone = forms.CharField(
                  label=_('Phone'),
                  widget=forms.TextInput(
                      attrs={
                          'placeholder': _('+33...')
                          }
                      )
                  )
      comment = forms.CharField(
                  label=_('Comment'),
                  widget=forms.Textarea(
                      attrs={
                          'placeholder': _('Your message'),
                          'rows': 8,
                          'cols': 80
                          }
                      )
                  )
  
      next = forms.CharField(required=False, widget=forms.HiddenInput())
  
  
subject: use ugettext_lazy instead of ugettext