claude-code - 💡(How to fix) Fix Add i18n support / Portuguese (pt-BR) localization for built-in slash commands

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Fix Action

Fix / Workaround

User-defined commands in ~/.claude/commands/ can be written in any language, but built-ins can't be overridden without patching the Mach-O binary (fragile, breaks on every update).

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Problem

Built-in slash command descriptions are hardcoded in English inside the Claude Code binary. Affected commands include:

  • /verify
  • /code-review
  • /loop
  • /schedule
  • /claude-api
  • /run
  • /init
  • /review
  • /security-review
  • /update-config
  • /keybindings-help
  • /fewer-permission-prompts

User-defined commands in ~/.claude/commands/ can be written in any language, but built-ins can't be overridden without patching the Mach-O binary (fragile, breaks on every update).

Request

  1. Add an i18n layer so UI strings and slash-command descriptions can be localized.
  2. Ship pt-BR (Brazilian Portuguese) as one of the supported locales.
  3. Allow selection via settings.json or an env var (e.g. CLAUDE_LANG=pt-BR).

Why it matters

  • Improves adoption in LATAM/Brazil, where Claude Code usage is growing.
  • Users already interact with Claude in their native language; having the CLI chrome match is a natural next step.
  • Other dev tools (VS Code, GitHub CLI, JetBrains) ship localized UI as standard.

Environment

  • Claude Code version: 2.1.147
  • Platform: macOS (Darwin 25.5.0, arm64)

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claude-code - 💡(How to fix) Fix Add i18n support / Portuguese (pt-BR) localization for built-in slash commands