      This is used by `ModelSerializer` when dealing with custom model fields,
      that do not have a serializer field to be mapped to.
      """
      default_error_messages = {
          'max_length': _('Ensure this field has no more than {max_length} characters.'),
      }
  
      def __init__(self, model_field, **kwargs):
          self.model_field = model_field
          # The `max_length` option is supported by Django's base `Field` class,
 
</s> remove         'blank': _('This field may not be blank.'),
        'max_length': _('Ensure this field has no more than {max_length} characters.'),
        'min_length': _('Ensure this field has at least {min_length} characters.')
 </s> add         'blank': _("This field may not be blank."),
        'max_length': _("Ensure this field has no more than {max_length} characters."),
        'min_length': _("Ensure this field has at least {min_length} characters.") </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         'invalid': _('A valid number is required.'),
        'max_value': _('Ensure this value is less than or equal to {max_value}.'),
        'min_value': _('Ensure this value is greater than or equal to {min_value}.'),
        'max_digits': _('Ensure that there are no more than {max_digits} digits in total.'),
        'max_decimal_places': _('Ensure that there are no more than {max_decimal_places} decimal places.'),
        'max_whole_digits': _('Ensure that there are no more than {max_whole_digits} digits before the decimal point.'),
        'max_string_length': _('String value too large.')
 </s> add         'invalid': _("A valid number is required."),
        'max_value': _("Ensure this value is less than or equal to {max_value}."),
        'min_value': _("Ensure this value is greater than or equal to {min_value}."),
        'max_digits': _("Ensure that there are no more than {max_digits} digits in total."),
        'max_decimal_places': _("Ensure that there are no more than {max_decimal_places} decimal places."),
        'max_whole_digits': _("Ensure that there are no more than {max_whole_digits} digits before the decimal point."),
        'max_string_length': _("String value too large.") </s> remove         'max_length': _('Ensure this filename has at most {max_length} characters (it has {length}).'),
 </s> add         'max_length': _("Ensure this filename has at most {max_length} characters (it has {length})."), </s> remove     message = _('This field must be unique.')
 </s> add     message = _("This field must be unique.")
        'max_length': _("Ensure this field has no more than {max_length} characters."),
      This is used by `ModelSerializer` when dealing with custom model fields,
      that do not have a serializer field to be mapped to.
      """
      default_error_messages = {
        'max_length': _("Ensure this field has no more than {max_length} characters."),
      }
  
      def __init__(self, model_field, **kwargs):
          self.model_field = model_field
          # The `max_length` option is supported by Django's base `Field` class,
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/fields.py