Documentation: Help With Translation

### What would you like to be added?

Any help with documentation translation is greatly appreciated!
The repo holding documentation is located here under `i18n`: https://github.com/KusionStack/kusionstack.io/tree/main/i18n

To build locally:
$ rm -rf .docusaurus
$ npm install
$ npm run start
Open http://localhost:3000/ in the browser.

To build locally with i18n:
$ npm run build
$ npx http-server ./build
Open http://localhost:8080/ in the browser.

### Why is this needed?

Help with translation is greatly appreciated!

Start in the linked i18n documentation repository and inspect which untranslated content is available. Run npm install followed by npm run start to preview the documentation, or use npm run build and npx http-server ./build for the i18n build. Done means selected documentation has been translated and renders correctly in the local preview.

Written by the indexing model from the issue text.