Feature Request: Support Chinese (zh-CN) dictation language in voice mode

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

When voice mode is enabled, Claude Code currently only supports English dictation. Running /voice shows the message: '"zh-CN" is not a supported dictation language; using English.' Chinese-speaking users cannot use voice input in their native language.

Proposed Solution

Add Chinese (zh-CN) as a supported dictation language in Claude Code's voice mode. This would allow Chinese-speaking users to dictate prompts in Mandarin Chinese instead of being forced to use English.

Alternative Solutions

Allow users to configure a custom speech recognition provider that supports their language. Or fall back gracefully with a warning rather than silently switching to English.

Priority

Medium - Would be very helpful

Feature Category

Configuration and settings

Use Case Example

1. User enables voice mode with /voice
2. Claude Code outputs: '"zh-CN" is not a supported dictation language; using English.'
3. User tries to speak in Chinese but the dictation recognizes nothing useful
4. Chinese-speaking users cannot benefit from voice input at all

Additional Context

Claude Code already detects the user's locale (zh-CN in this case), so the infrastructure to support localization exists. Adding zh-CN to the supported dictation language list would make Claude Code much more accessible to the large Chinese-speaking developer community.