docs: update docs for LocaleProvider, close: #5271

components/locale-provider/index.en-US.md

@@ -23,6 +23,16 @@ return <LocaleProvider locale={enUS}><App /></LocaleProvider>;
 
 We provide some locale like English, Chinese, Russian, German, French and etc, all locale packages can be found in [here](https://github.com/ant-design/ant-design/blob/master/components/locale-provider/).
 
+Note: if you need to use antd's UMD dist file, please import `antd/dist/antd-with-locales.js`:
+
+```jsx
+const { LocaleProvider, locales } = window.antd;
+
+...
+
+return <LocaleProvider locale={locales.en_US}><App /></LocaleProvider>;
+```
+
 ### Add a new language
 
 If you can't find your language, you are welcome to create a locale package based on [en_US](https://github.com/ant-design/ant-design/blob/master/components/locale-provider/en_US.tsx) and send us a pull request.

components/locale-provider/index.zh-CN.md

@@ -23,6 +23,16 @@ return <LocaleProvider locale={enUS}><App /></LocaleProvider>;
 
 我们提供了英语，中文，俄语，法语，德语等多种语言支持，所有语言包可以在 [这里](https://github.com/ant-design/ant-design/blob/master/components/locale-provider/) 找到。
 
+注意：如果你需要使用 UMD 版的 dist 文件，应该引入 `antd/dist/antd-with-locales.js`，然后按以下方式使用：
+
+```jsx
+const { LocaleProvider, locales } = window.antd;
+
+...
+
+return <LocaleProvider locale={locales.en_US}><App /></LocaleProvider>;
+```
+
 ### 增加语言包
 
 如果你找不到你需要的语言包，欢迎你在 [英文语言包](https://github.com/ant-design/ant-design/blob/master/components/locale-provider/en_US.tsx) 的基础上创建一个新的语言包，并给我们 Pull Request。