Cannot change the display language by installing the language pack extension via cli

[hwdef]

OS/Web Information

• Web Browser: firefox/edge
• Local OS: windows10
• Remote OS: centos7
• Remote Architecture: amd64
• code-server --version: 4.0.1 735c6da

Steps to Reproduce

1. download language extension (https://marketplace.visualstudio.com/items?itemName=MS-CEINTL.vscode-language-pack-zh-hans)
2. install it code-server --install-extension MS-CEINTL.vscode-language-pack-zh-hans-1.63.3.vsix
3. start code-server

Expected

Display language changed to Chinese

Actual

nothing happens, even if I enter Configure Display Language through the command panel, there is no Chinese option

If I install this language extension online, a prompt will pop up in the lower right corner of the browser, asking if I want to change the display language, but there is no prompt after installing the extension offline

Logs

Screenshot

Notes

This issue can be reproduced in VS Code: Yes/No

[jsjoeio]

Hmmm..when I download from OpenVSX, it says not compatible. I think you need to install this version: https://open-vsx.org/extension/MS-CEINTL/vscode-language-pack-zh-hans/1.63.3

However, if I search for it within code-server and click install, it installs and restarts in Chinese.

Video

Screen.Recording.2022-01-14.at.2.24.18.PM.mov

With CLI

I tried again with 1.63.3 and see the same issue that you're describing. It seems like there could be an issue with the way extensions are installed via the CLI vs the UI 🤔

Possibly related to #4749

cc @code-asher

Workaround

For now, the workaround is to install it while online via the UI

[code-asher]

Ah yeah I think it is the same issue here: #3372 (comment)