  
  
  class BaseUniqueForValidator:
      message = None
      missing_message = _('This field is required.')
  
      def __init__(self, queryset, field, date_field, message=None):
          self.queryset = queryset
          self.field = field
          self.date_field = date_field
 
</s> remove     message = _('The fields {field_names} must make a unique set.')
    missing_message = _('This field is required.')
 </s> add     message = _("The fields {field_names} must make a unique set.")
    missing_message = _("This field is required.") </s> remove     message = _('This field must be unique.')
 </s> add     message = _("This field must be unique.") </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}" year.')
 </s> add     message = _("This field must be unique for the \"{date_field}\" year.") </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.")
    missing_message = _("This field is required.")
  
  
  class BaseUniqueForValidator:
      message = None
    missing_message = _("This field is required.")
  
      def __init__(self, queryset, field, date_field, message=None):
          self.queryset = queryset
          self.field = field
          self.date_field = date_field
keep keep keep keep 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