VSCode extension voice input forces English transcription, ignoring pt-BR system locale

Description

The voice input button (microphone icon) in the Claude Code VSCode extension transcribes Portuguese (pt-BR) speech as English, producing gibberish output. The extension provides no configuration option to change the speech-to-text language.

Steps to reproduce

1. Install Claude Code extension v2.1.140 on Windows 11
2. Confirm system locale is pt-BR (via Get-Culture in PowerShell — returns pt-BR)
3. Click the microphone button in the Claude chat input
4. Speak any sentence in Portuguese
5. Observe: transcription comes back as broken English

Example of actual output when speaking Portuguese:

"Hey, is it you now in Tenderl? Brookie. Burkendo printchi coaching v a. alioclaudge coach"

(Portuguese phonemes are being force-mapped to English words.)

Expected behavior

Any of the following would solve this:

• Auto-detect language from speech
• Respect Windows system locale (pt-BR in this case)
• Expose a claudeCode.voiceInputLanguage setting in the extension configuration

Actual behavior

Transcription is always forced to English. Non-English phonemes are mapped to English words, producing nonsensical output that's unusable.

Environment

• OS: Windows 11 Pro
• Claude Code VSCode extension: 2.1.140 (latest as of report)
• Windows system language: pt-BR
• Windows speech services: pt-BR installed and working

Settings reviewed

I checked all 13 settings exposed by the extension — none relate to voice, language, or locale:

claudeCode.environmentVariables
claudeCode.useTerminal
claudeCode.allowDangerouslySkipPermissions
claudeCode.claudeProcessWrapper
claudeCode.respectGitIgnore
claudeCode.initialPermissionMode
claudeCode.disableLoginPrompt
claudeCode.autosave
claudeCode.useCtrlEnterToSend
claudeCode.preferredLocation
claudeCode.enableNewConversationShortcut
claudeCode.enableReopenClosedSessionShortcut
claudeCode.hideOnboarding
claudeCode.usePythonEnvironment

Workaround currently in use

Using Win + H (Windows native dictation) which respects pt-BR locale correctly. Works fine, but defeats the convenience of the integrated extension mic button.

Impact

Non-English speakers cannot effectively use the voice input feature. This affects users speaking Portuguese, Spanish, French, German, Italian, Japanese, and any other non-English language — likely a large portion of the international user base.

Suggested fix

Add a configuration option:

"claudeCode.voiceInputLanguage": {
  "type": "string",
  "default": "auto",
  "enum": ["auto", "en-US", "pt-BR", "es-ES", "fr-FR", "de-DE", "it-IT", "ja-JP", "zh-CN", "ko-KR"],
  "description": "Language for voice input transcription. 'auto' attempts to detect from speech or fall back to system locale."
}

Either auto-detection or an explicit selector would solve the issue.

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Happy to provide additional logs or test fixes. Thanks!