[FEATURE] Permission dialog / tool approval UI should support localization (Japanese)

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

Claude Code's tool approval dialog (e.g., "Do you want to proceed?") is hardcoded in English and cannot be localized. Non-English-speaking users, particularly those using Claude Code in Japanese, find this disruptive as the rest of their workflow is in their native language.

It would be greatly appreciated if the permission/approval UI supported localization, or at minimum provided a Japanese translation option.

Proposed Solution

Add localization support to the tool approval dialog and other system-level UI prompts in Claude Code. Possible approaches:

• Detect the system locale and display prompts in the appropriate language
• Add a language setting in Claude Code's configuration (e.g., settings.json) that overrides the UI language
• At minimum, provide a Japanese translation of the approval dialogs as a first step

Alternative Solutions

_No response_

Priority

High - Significant impact on productivity

Feature Category

Interactive mode (TUI)

Use Case Example

_No response_

Additional Context

_No response_