Update README-ja.md

Author: d60

README-ja.md

@@ -9,6 +9,8 @@
 [![Discord](https://img.shields.io/badge/Discord-%235865F2.svg?style=for-the-badge&logo=discord&logoColor=white)](https://discord.gg/nCrByrr8cX)
 [![BuyMeACoffee](https://img.shields.io/badge/-buy_me_a%C2%A0coffee-gray?logo=buy-me-a-coffee)](https://www.buymeacoffee.com/d60py)
 
+[[English](https://github.com/d60/twikit/blob/main/README.md)]
+[[中文](https://github.com/d60/twikit/blob/main/README-zh.md)]
 
 # Twikit <img height="35"  src="https://i.imgur.com/9HSdIl4.png"  valign="bottom">