old_contents: # -*- coding: utf-8 -*_
  from django import forms
  from django.forms.models import BaseInlineFormSet
  
  from .utils.i18n import get_language
  
  __all__ = [
      'TranslationModelFormMixin',
      'TranslationModelForm',
  ]
  
  
  class TranslationModelFormMixin(object):
  
      language = None
  
      def __init__(self, *args, **kwargs):
          current_language = kwargs.pop('_current_language', None)
          super(TranslationModelFormMixin, self).__init__(*args, **kwargs)
          instance = kwargs.get('instance', None)
          if self.language is None:
              if instance:
                  self.language = instance.language
                  return
              self.language = current_language or get_language()
  
      def _post_clean(self):
          self.instance.language = self.language
          super(TranslationModelFormMixin, self)._post_clean()
  
  
  class TranslationModelForm(TranslationModelFormMixin, forms.ModelForm):
      pass
  
  
  class TranslationBaseInlineFormSet(BaseInlineFormSet):
  
      language = None
  
      def _construct_form(self, i, **kwargs):
          form = super(TranslationBaseInlineFormSet, self)._construct_form(i, **kwargs)
          form.language = self.language
          return form
  
      def save_new(self, form, commit=True):
          obj = super(TranslationBaseInlineFormSet, self).save_new(form, commit)
          return obj
  
new_contents: # -*- coding: utf-8 -*_
  from django import forms
  from django.forms.models import BaseInlineFormSet
  
  from .utils.i18n import get_language
  
  __all__ = [
      'ModelTranslationFormMixin',
      'ModelTranslationForm',
  ]
  
  
  class ModelTranslationFormMixin(object):
  
      language = None
  
      def __init__(self, *args, **kwargs):
          current_language = kwargs.pop('_current_language', None)
          super(ModelTranslationFormMixin, self).__init__(*args, **kwargs)
          instance = kwargs.get('instance', None)
          if self.language is None:
              if instance:
                  self.language = instance.language
                  return
              self.language = current_language or get_language()
  
      def _post_clean(self):
          self.instance.language = self.language
          super(ModelTranslationFormMixin, self)._post_clean()
  
  
  class ModelTranslationForm(ModelTranslationFormMixin, forms.ModelForm):
      pass
  
  
  class ModelTranslationInlineFormSet(BaseInlineFormSet):
  
      language = None
  
      def _construct_form(self, i, **kwargs):
          form = super(ModelTranslationInlineFormSet, self)._construct_form(i, **kwargs)
          form.language = self.language
          return form
  
      def save_new(self, form, commit=True):
          obj = super(ModelTranslationInlineFormSet, self).save_new(form, commit)
          return obj
  
subject: Rename form classes.