How to use the ajv-i18n.zh function in ajv-i18n

Array.isArray(additionalMetaSchemas)
  ) {
    ajv = createAjvInstance();
    ajv.addMetaSchema(additionalMetaSchemas);
    formerMetaSchema = additionalMetaSchemas;
  }

  let validationError = null;
  try {
    ajv.validate(schema, formData);
  } catch (err) {
    validationError = err;
  }

  // 加入中文错误提示
  localize.zh(ajv.errors);

  let errors = transformAjvErrors(ajv.errors);
  // Clear errors to prevent persistent errors, see #1104

  ajv.errors = null;

  const noProperMetaSchema =
    validationError &&
    validationError.message &&
    typeof validationError.message === "string" &&
    validationError.message.includes("no schema with key or ref ");

  if (noProperMetaSchema) {
    errors = [
      ...errors,
      {

useDefaults: true,
    removeAdditional: flag ? false : true
  });

  var localize = require('ajv-i18n');
  delete schema2.closeRemoveAdditional;

  const schema = ejs(schema2);

  schema.additionalProperties = flag ? true : false;
  const validate = ajv.compile(schema);
  let valid = validate(params);

  let message = '请求参数 ';
  if (!valid) {
    localize.zh(validate.errors);
    message += ajv.errorsText(validate.errors, { separator: '\n' });
  }

  return {
    valid: valid,
    message: message
  };
};