mention weblate & add weblate badge (#569)

* mention weblate & add weblate badge

* remove installer badge

* delete outdated stuff

README.md

@@ -4,7 +4,7 @@
   <br>
   <small><i>LOGO designed by <a href="https://xio.ng" target="_blank">熊大</a> .</i></small>
   <br><br>
-<img alt="GitHub release (with filter)" src="https://img.shields.io/github/v/release/nezhahq/nezha?color=brightgreen&style=for-the-badge&logo=github&label=Dashboard">&nbsp;<img src="https://img.shields.io/github/v/release/nezhahq/agent?color=brightgreen&label=Agent&style=for-the-badge&logo=github">&nbsp;<img src="https://img.shields.io/github/actions/workflow/status/nezhahq/agent/agent.yml?label=Agent%20CI&logo=github&style=for-the-badge">&nbsp;<img src="https://img.shields.io/badge/Installer-v0.20.2-brightgreen?style=for-the-badge&logo=linux">
+<img alt="GitHub release (with filter)" src="https://img.shields.io/github/v/release/nezhahq/nezha?color=brightgreen&style=for-the-badge&logo=github&label=Dashboard">&nbsp;<img src="https://img.shields.io/github/v/release/nezhahq/agent?color=brightgreen&label=Agent&style=for-the-badge&logo=github">&nbsp;<img src="https://img.shields.io/github/actions/workflow/status/nezhahq/agent/agent.yml?label=Agent%20CI&logo=github&style=for-the-badge">&nbsp;<a href="https://hosted.weblate.org/engage/nezha/"><img src="https://img.shields.io/weblate/progress/nezha?color=brightgreen&label=Translated&style=for-the-badge&logo=weblate" alt="Translation status" /></a>
   <br>
   <br>
   <p>:trollface: <b>Nezha Monitoring: Self-hostable, lightweight, servers and websites monitoring and O&M tool.</b></p>
@@ -22,21 +22,19 @@
 - [English](https://nezhahq.github.io/en_US/index.html)
 - [中文文档](https://nezhahq.github.io/index.html)
 
+## Contributing
+
+### Translation
+
+Is Nezha not in your language, or the translation is incorrect or incomplete? Get involved in the translations on [Hosted Weblate](https://hosted.weblate.org/engage/nezha/).
+
 ## Screenshots
 
 | 用户前台 [@hamster1963](https://github.com/hamster1963) | 管理后台 [@uubulb](https://github.com/uubulb) |
 |---|---|
 | ![user](.github/user-frontend.20241128.png)  | ![admin](.github/admin-frontend.20241128.png)  |
 | [hamster1963/nezha-dash](https://github.com/hamster1963/nezha-dash)  | [nezhahq/admin-frontend](https://github.com/nezhahq/admin-frontend)  |
 
-## Supported Languages
-
-- English
-- 中文
-- Español
-
-You can change the dashboard language in the settings page (`/setting`) after the dashboard is installed.
-
 ## Contributors
 
 <!--GAMFC_DELIMITER--><a href="https://github.com/naiba" title="naiba"><img src="https://avatars.githubusercontent.com/u/29243953?v=4" width="50;" alt="naiba"/></a>