Can locale accept both string and object types? Because I want to add options that are not provided in translation, such as Chinese

[Heather-Li]

Can 'locale' accept both 'string' and 'object' types? Because I want to add options that are not provided in translation, such as Chinese。
I think the function 'getMessage' can be modified as follows

  // const translationExists = (translations[locale] && translations[locale][key]);
  // const translation = translationExists ? translations[locale][key] : translations['en'][key];
 let translationExists;
  let translation;
  if (locale && typeof locale === 'object') {
    translation = locale[key] ? locale[key] : translations['en'][key];
  } else {
    translationExists = translations[locale] && translations[locale][key];
    translation = translationExists ? translations[locale][key] : translations['en'][key];
  }

And I want to provide a Chinese translation,maybe someone needs

const cn = {
  uploading: '上传中',
  uploadingItem: '上传一个项目中',
  uploadingItems: '上传 {quantity} 个项目中',
  upload: '上传',
  remove: '删除',
  download: '下载',
  rename: '重命名',
  creating: '新建中',
  creatingName: '新建 {name}中...',
  create: '新建',
  createFolder: '新建文件夹',
  zipping: '压缩中',
  zippingItem: '压缩一个项目中',
  zippingItems: '压缩 {quantity} 个项目中',
  items: 'items',
  item: 'item',
  cancel: '取消',
  confirm: '确定',
  folderName: '文件夹名称',
  files: '文件',
  fileExist: '文件或者文件夹名称 {name} 已存在',
  newName: '新名称',
  emptyName: '名称不能为空',
  tooLongFolderName: '文件夹名称不能超过25个字符',
  folderNameNotAllowedCharacters: '文件夹名称存在不被允许的字符',
  title: '名称',
  fileSize: '大小',
  lastModified: '修改日期',
  reallyRemove: '{files} 将被删除. 确定继续？',
  unableReadDir: '无法读取目录.'
}