Update README.md | Add translation section (#15830)

* Update README.md

* chinese translation

Signed-off-by: a1012112796 <1012112796@qq.com>

* Update README.md

* Update README.md

* Update README.md

Co-authored-by: a1012112796 <1012112796@qq.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

README.md

@@ -101,6 +101,16 @@ NOTES:
 1. **YOU MUST READ THE [CONTRIBUTORS GUIDE](CONTRIBUTING.md) BEFORE STARTING TO WORK ON A PULL REQUEST.**
 2. If you have found a vulnerability in the project, please write privately to **security@gitea.io**. Thanks!
 
+## Translating
+
+Translations are done through Crowdin. If you want to translate to a new language ask one of the managers in the Crowdin project to add a new language there. 
+
+You can also just create an issue for adding a language or ask on discord on the #translation channel. If you need context or find some translation issues, you can leave a comment on the string or ask on Discord. For general translation questions there is a section in the docs. Currently a bit empty but we hope fo fill it as questions pop up.
+
+https://docs.gitea.io/en-us/translation-guidelines/
+
+[![Crowdin](https://badges.crowdin.net/gitea/localized.svg)](https://crowdin.com/project/gitea)
+
 ## Further information
 
 For more information and instructions about how to install Gitea, please look at our [documentation](https://docs.gitea.io/en-us/).

README_ZH.md

@@ -71,6 +71,11 @@ Gitea 的首要目标是创建一个极易安装，运行非常快速，安装
 
 Fork -> Patch -> Push -> Pull Request
 
+## 翻译
+
+多语言翻译是基于Crowdin进行的.
+[![Crowdin](https://badges.crowdin.net/gitea/localized.svg)](https://crowdin.com/project/gitea)
+
 ## 作者
 
 * [Maintainers](https://github.com/orgs/go-gitea/people)