Chinese voice recognition stopped working after VS Code Speech automatically updated

[YifanTonyJu]

VS Code Version:
1.131.0

VS Code Speech Version:
0.16.0

Chinese (Simplified) Language Support for VS Code Speech:
0.5.1

OS Version:
Darwin arm64 25.5.0 (macOS 26)

Feature:
Copilot Chat voice input

Selected model:
Claude Haiku 4.5

Logs:
None

Problem

Today, I opened Copilot Chat and clicked the microphone button to use voice input.

Before voice input started, VS Code automatically downloaded a new speech component/update. After the download completed, Chinese speech was no longer recognized correctly.

Before this automatic update, both Chinese and English voice input worked correctly.

After the update:

• English speech is recognized normally.
• Chinese speech is not recognized (or is transcribed incorrectly).

I did not change any VS Code settings, microphone permissions, or macOS settings. The only change was the automatic speech component update.

I also tried:

• Installing the Chinese (Simplified) Language Support for VS Code Speech extension.
• Setting "accessibility.voice.speechLanguage" to "zh-CN".
• Setting it back to "auto".
• Reloading the VS Code window.
• Restarting VS Code.

None of these solved the problem.

Steps to Reproduce

1. Open Copilot Chat.
2. Click the microphone button.
3. VS Code automatically downloads a speech component/update.
4. Speak Chinese.
5. Chinese speech is not recognized correctly.
6. Speak English.
7. English speech is recognized normally.

Expected Behavior

Chinese voice recognition should continue to work after the speech component is updated, just as it did before.

Actual Behavior

After the speech component update, only English speech is recognized correctly. Chinese speech recognition no longer works.