Merge pull request #1610 from Shawn-Shaw-x/main

Add a language switcher in README.md file.

Author: EnriqueL8

README.md

@@ -12,6 +12,9 @@ Hyperledger FireFly is the first open source Supernode: a complete stack for ent
 
 The FireFly API for digital assets, data flows, and blockchain transactions makes it radically faster to build production-ready apps on popular chains and protocols.
 
+
+[ENGLISH](./README.md) | [简体中文](./README_zh_CN.md)
+
 ## Start using Hyperledger FireFly
 
 The best place to learn about FireFly is in the [documentation](https://hyperledger.github.io/firefly).