[FEATURE] Feature Request: UI localization support (e.g., Portuguese / pt-BR)##

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

Os comandos e opções de "botões" e alguns comandos não ficam traduzidos para o português. O Claude Code não consegue alterar a linguagem para o português de toda a interface.

Proposed Solution

Feature Request: Interface localization / language support

Summary

Add support for localizing the Claude Code UI — including button labels, slash command descriptions, help text, and system messages — into languages other than English.

Motivation

Many users interact with Claude Code in non-English languages. While Claude's AI responses can be configured to respond in any language, the application interface (menus, buttons, /help output, skill descriptions, etc.) remains fixed in English. This creates a fragmented experience for non-English speakers.

Proposed solution

• Add a language or locale setting in settings.json (e.g., "language": "pt-BR")
• Use that setting to serve localized strings for UI elements
• Start with the most commonly used languages (e.g., Portuguese, Spanish, French, Japanese, Chinese)

Example

// ~/.claude/settings.json
{
  "language": "pt-BR"
}

### Alternative Solutions

_No response_

### Priority

Critical - Blocking my work

### Feature Category

CLI commands and flags

### Use Case Example

_No response_

### Additional Context

_No response_