Feature Request: Localize slash command descriptions based on language setting

Summary

When pressing / in an interactive session, the built-in command descriptions in the autocomplete menu are displayed only in English. Since settings.json already supports a language setting (e.g., "japanese"), it would be great if the slash command autocomplete menu also respected this setting.

Current Behavior

• settings.json language setting only affects Claude's response language
• Built-in command descriptions (/clear, /rename, /compact, etc.) are hardcoded in English
• Custom skills can have custom descriptions via frontmatter, but built-in commands cannot be customized

Desired Behavior

• The slash command autocomplete menu should display descriptions in the language configured in settings.json
• Or at minimum, provide a way for users to override/customize built-in command descriptions

Use Case

Non-English speaking users (e.g., Japanese) would benefit from seeing command descriptions in their native language when browsing the autocomplete menu, improving discoverability and usability.

Environment

• OS: Windows 11
• Language setting: "japanese"