docs: add en translation to why.md (#348)

Co-authored-by: wuyu50 <wuyu50@meituan.com>

docs/pages/guide/why.md

@@ -24,6 +24,8 @@ Valaxy aims to be a next generation of static blogging frameworks/generators.
 Valaxy 的目标是成为新一代的静态博客框架/生成器。
 :::
 
+<div lang="zh-CN">
+
 ::: info
 
 - V + galaxy = Valaxy
@@ -41,6 +43,27 @@ Valaxy 的目标是成为新一代的静态博客框架/生成器。
 
 这是重复造轮子吗？我认为不是。
 
+</div>
+
+<div lang="en">
+
+::: info
+
+- V + galaxy = Valaxy
+  - V: it based on vue + vite
+  - galaxy: I hope it can be like a platform tool, hosting everyone's blog, as beautiful as the galaxy
+
+:::
+
+My blog was previously built on Hexo, but as modern front-end frameworks continue to advance, Hexo's workflow and development experience have begun to lag behind.
+So I decided to build a new [hexo-theme-yun](https://github.com/YunYouJun/hexo-theme-yun/) based on Vue and Vite.
+
+My previous intention was to refactor the theme using a modern front-end framework, but the separation from Hexo also meant that I had to redo some of the rendering work that Hexo itself had done. So if I do that, why not develop a static site generator for blogs by the way? So I decided to call it Valaxy.
+
+Is this a reinventing the wheel? I don't think so.
+
+</div>
+
 ## 为什么是 Valaxy? {lang="zh-CN"}
 
 ::: zh-CN
@@ -99,29 +122,65 @@ export default defineValaxyConfig<ThemeConfig>({
 
 ## 为什么不是……？ {lang="zh-CN"}
 
+::: zh-CN
+
 > Wordpress/Typecho 等是动态博客，因此不在考虑范围内。
 
+:::
+
+::: en
+
+> Wordpress/Typecho are dynamic blogs and therefore are not considered.
+
+:::
+
 ### [Hexo](https://hexo.io/)/[Hugo](https://gohugo.io/)/Jekyll
 
+::: zh-CN
+
 我非常需要现代前端框架提供的开发热重载与 PJAX 体验，以及 TypeScript 的类型提示，但 Hexo 似乎已经有些积重难返，基于此来做一些工作将会束手束脚。
 
 Hugo 也是很棒的静态站点生成器，但是我并没有使用 Go 的需求。当然在打包时所使用的 ESBuild 正是基于 Go 实现。但这并不需要我操心。
 
 Jekyll 算是元老，但同样我并不使用 Ruby，且它似乎并不便捷，也同样存在一些开发体验的问题。
 GitHub 为其提供了原生支持是一大优势，但我打算类似使用 GitHub Actions 来达成该方面近乎一致的体验。
 
+:::
+
+::: en
+
+I badly need the HMR and PJAX development experience that modern front-end frameworks provide, as well as TypeScript's type hints, but Hexo seems to have gotten a little stuck in the past, and doing something based on it would be limiting.
+
+Hugo is also a great static site generator, but I have no need to use Go. Of course, the ESBuild used in packaging is based on the Go implementation. But that's not for me to worry about.
+
+Jekyll is a bit of a veteran, but again I don't use Ruby, and it doesn't seem to be easy, and there are some issues with the development experience. The fact that GitHub has native support for it is a big advantage, but I intend to use GitHub Actions to achieve a nearly consistent experience in this regard.
+
+:::
+
 <!-- 最后，我有一些尝试想要实现。见[重新构想博客框架(Todo)]。
 譬如，可以提供一种主题商店，用户仅需在 GitHub Repo 中存放自己的文章。
 在主题商店，填写自己的 Repo 地址，选中主题切换即可在线预览内容效果。（这完全可以做到，只需要动态纯前端获取 Markdown 内容并渲染即可）
 而用户想要应对 SEO 时，则可再将其渲染为静态页面。我也将会为此提供一个一键可用的 GitHub Actions 脚本。 -->
 
 ### VuePress/VitePress
 
+::: zh-CN
+
 [VitePress](https://vitepress.dev/) 几乎已成为了 VuePress 的继任者。
 
 但 VitePress 是一个很棒的静态站点生成器，它为文档打造，但缺少一些针对博客的定制便捷功能。
 如：RSS、文件自动路由（vue-router）、插件（挂件）机制、文章列表/分类/标签钩子、自定义覆盖布局、覆盖组件、单页切换的 i18n、KaTeX 等。
 
+:::
+
+::: en
+
+[VitePress](https://vitepress.dev/)  is almost the successor to VuePress.
+
+But VitePress is a great static site generator, which is built for documentation, but lacks some convenient customization features for blogs, such as RSS, file automatic routing (vue-router), plugin (widget) mechanism, article list/category/tag hooks, custom override layout, override components, single-page switching i18n, KaTeX, etc.
+
+:::
+
 ### [iles](https://github.com/ElMassimo/iles)
 
 ::: zh-CN
@@ -144,8 +203,18 @@ In addition, Valaxy also provides more blog oriented features such as article li
 
 ## Thanks
 
+::: zh-CN
+
 💗 Valaxy 的实现基于或参考了以下项目：
 
+:::
+
+::: en
+
+The implementation of Valaxy is based on or referenced from the following projects:
+
+:::
+
 - [Vue](https://github.com/vuejs/core)
 - [VueUse](https://github.com/vueuse/vueuse)
 - [Vite](https://github.com/vitejs/vite)