Navbar items doesnt change when switch language

[dewfall123]

Describe the bug
Navbar items doesnt change in ssr render.
And sidebar doesnt change when build with a site base.

To Reproduce
Steps to reproduce the behavior:

1. clone this repo
2. run
   yarn
yarn build
yarn build-dev
3. open http://127.0.0.1:3002 and switch the language to Chinese.
   The first nav doesnt change to Chinese, witch should be 指南。

The second bug.

1. set a site base.
2. run
   yarn build
yarn build-dev
3. switch the language to Chinese, Sidebar doesnt change.

Expected behavior
Navbar and sidebar should change when switch the language to Chinese.

System Info

• vitepress version: 0.7.0
• vite version: v1.0.0-rc.4
• Node version: 14
• OS version: windows 10

Additional context
I am trying to fix this.