Update README.md

Author: KaKeimei

README.md

@@ -22,10 +22,19 @@ $ yarn
 
 ### Local Development
 
+English Version
+
 ```
 $ yarn start
 ```
 
+Chinese Version
+
+```
+$ yarn start --locale zh-CN
+```
+
+
 This command starts a local development server and opens up a browser window. Most changes are reflected live without having to restart the server.
 
 ### Build