      Validator that corresponds to `unique_together = (...)` on a model class.
  
      Should be applied to the serializer class, not to an individual field.
      """
      message = _('The fields {field_names} must make a unique set.')
      missing_message = _('This field is required.')
  
      def __init__(self, queryset, fields, message=None):
          self.queryset = queryset
          self.fields = fields
          self.serializer_field = None
 
</s> remove     message = _('This field must be unique.')
 </s> add     message = _("This field must be unique.") </s> remove     missing_message = _('This field is required.')
 </s> add     missing_message = _("This field is required.") </s> remove         'max_length': _('Ensure this field has no more than {max_length} characters.'),
 </s> add         'max_length': _("Ensure this field has no more than {max_length} characters."), </s> remove     message = _('This field must be unique for the "{date_field}" date.')
 </s> add     message = _("This field must be unique for the \"{date_field}\" date.") </s> remove     message = _('This field must be unique for the "{date_field}" month.')
 </s> add     message = _("This field must be unique for the \"{date_field}\" month.")
    message = _("The fields {field_names} must make a unique set.")
    missing_message = _("This field is required.")
      Validator that corresponds to `unique_together = (...)` on a model class.
  
      Should be applied to the serializer class, not to an individual field.
      """
    message = _("The fields {field_names} must make a unique set.")
    missing_message = _("This field is required.")
    message = _("The fields {field_names} must make a unique set.")
    missing_message = _("This field is required.")
  
      def __init__(self, queryset, fields, message=None):
          self.queryset = queryset
          self.fields = fields
          self.serializer_field = None
keep keep keep keep replace replace keep keep keep keep keep
 use double quotes for user visible strings; end user visible strings in full stops; add some missing translation tags 
rest_framework/validators.py