Feature request: Localize tool permission prompts ("Do you want to proceed?") based on user locale

Summary

The tool permission dialog (shown when Claude Code requests access to files, shell commands, etc.) is hardcoded in English and cannot be localized through skills or custom instructions.

Current behavior

Read file

Read(~/some/file.png)

Do you want to proceed?
❯ 1. Yes
  2. Yes, allow reading from folder/ during this session
  3. No

Expected behavior

The permission prompt should respect the user's locale or a configurable language setting, so non-English speakers can understand the choices without needing to memorize the fixed pattern.

For example, in Japanese:

ファイルを読み込みます

Read(~/some/file.png)

続行しますか？
❯ 1. はい
  2. はい（このセッション中は常に許可）
  3. いいえ

Why this matters

• Users who are not fluent in English find it difficult to judge whether to approve or deny a tool execution
• The japanese-output skill and CLAUDE.md instructions only affect Claude's text output — they cannot change the system UI prompts
• This creates friction for non-English users in every tool execution

Proposed solution

• Add locale detection (based on system locale or a CLAUDE_LANG / settings option)
• Or allow the prompt strings to be overridden via user settings

Reported on behalf of a Japanese user.