Feature request: Localization support for CLI interface (Traditional Chinese / zh-TW)

Feature Request: CLI Interface Localization (Traditional Chinese)

Problem

Currently, the Claude Code CLI interface prompts are hardcoded in English and cannot be changed via settings.json. For example:

• Session quality survey: "Can Anthropic look at your session transcript to help us improve Claude Code?"
• Confirmation dialogs
• Other built-in UI text

The existing "language" setting in settings.json only affects Claude's responses, not the CLI's own interface text.

Request

Add localization / i18n support for the CLI interface, with Traditional Chinese (zh-TW) as a priority for users in Taiwan and Hong Kong.

Suggested Setting

{
  "uiLanguage": "zh-TW"
}

Why This Matters

Many users are more comfortable in their native language. Having the interface in English while responses are in Traditional Chinese creates an inconsistent experience.

Thank you for considering this!