# I18n

Paseo client UI translations live in `packages/app/src/i18n`.

## Supported Locales

- `en`
- `ar`
- `es`
- `fr`
- `ja`
- `pt-BR`
- `ru`
- `zh-CN`

The persisted app language setting is `"system" | "ar" | "en" | "es" | "fr" | "ja" | "pt-BR" | "ru" | "zh-CN"`. `"system"` follows the device or browser locale when it maps to a supported locale; unsupported system locales fall back to English. Japanese maps from system locales `ja` and Japanese regional locales. Brazilian Portuguese maps from system locales `pt-BR` and bare `pt`; other Portuguese regional locales remain unsupported until explicitly added.

## Translation Scope

Translate client-owned UI copy: labels, buttons, empty states, confirmation text, and local status/error wrappers.

Do not translate agent output, daemon output, terminal contents, file paths, provider names, model names, command names, user-authored text, code blocks, logs, or raw protocol/server error text.

## Adding Copy

English source strings live in `packages/app/src/i18n/resources/en.ts`. Simplified Chinese strings live in `packages/app/src/i18n/resources/zh-CN.ts`.

For migrated screens and components, use `useTranslation()` and pass translated text into UI primitives. Low-level primitives such as `<Button>` do not import translation state unless they own the text they render.

Keep resource keys grouped by product surface, not component mechanics.

Run:

```bash
npx vitest run packages/app/src/i18n/resources.test.ts --bail=1
```

The parity test catches missing keys across English and every supported locale resource.

## Forge-Variant Copy

Strings that vary by git forge follow a two-tier rule:

- **Indeclinable tokens** — brand names ("GitHub", "GitLab"), the PR/MR initialism, number prefixes (`#`/`!`) — are interpolated into a single key (`"Refresh git and {{brand}} state"`). These tokens stay latin and uninflected in every supported locale, so one string per locale suffices. The value comes from the forge manifest via `getForgePresentation`.
- **Sentences containing the full change-request noun** ("pull request" / "merge request" inflects and takes gender/case in translation) use the i18next `context` mechanism: the base key carries the pull-request wording and an `_mr` sibling carries the merge-request wording (`pullRequest` / `pullRequest_mr`). Call sites pass `t(key, { context: getForgePresentation(forge).changeRequestContext })`; an undefined or unknown context falls back to the base key.

Keys scale per vocabulary family (PR vs MR), not per forge: a new forge picks an existing family in its manifest entry and needs zero locale edits.

## Migration Order

Client UI translation is staged so each pass can migrate complete local copy clusters and keep reviews focused.

1. App shell and shared UI chrome: common actions, headers, sheets, command center, and client-owned toast status.
2. Composer and agent workflow: composer input, agent controls, permission prompts, plan approval, and agent panel wrapper states.
3. Settings expansion: Appearance, Shortcuts, Integrations, Permissions, Diagnostics, About, Project settings, Host settings, and provider diagnostics.
4. Workspace and panels: setup/file/browser/terminal wrapper copy, file explorer local states, import-session flows, and remaining local toast/error wrapper text.

Within a migrated surface, do not leave mixed-language neighboring labels when those labels are owned by the client. Move the whole local copy cluster together.

### Progress

- Batch 2 migrated Composer and agent workflow chrome: Composer input and attachments, agent controls, stream permission prompts, agent panel wrapper states, and draft panel descriptors. Provider/model names, provider-defined option labels, agent output, and protocol/server diagnostics remain untranslated.
- Batch 3A migrated Settings Diagnostics/About, Appearance, Shortcuts, Integrations, and Desktop Permissions chrome. Host settings and Project settings remain for Batch 3B; raw runtime status/error details remain untranslated.
- Batch 3B migrated Host settings, Provider diagnostics, and Project settings chrome. Provider/model names, project/host labels, script commands, diagnostic output, file paths, and raw runtime/server error details remain untranslated.
- Batch 4A migrated workspace wrapper chrome for import sessions, file explorer, setup, browser, terminal, and file panels. File paths, URLs, commands, logs, terminal output, provider labels, and raw runtime/server errors remain untranslated.
- Batch 4B migrated workspace tab shell, workspace scripts, Git actions/diff/PR chrome, worktree archive warnings, Open-in-editor controls, and inline review controls. Branch names, PR titles/bodies, check names, workflow names, file paths, diff contents, commands, terminal output, provider labels, and raw runtime/server errors remain untranslated.
- Batch 4C migrated Sidebar project/workspace menus, hide/remove/archive confirmations, workspace rename chrome, New workspace ref picker/create flow, and Open project home tiles. Workspace/project names, branch names, PR titles, paths, provider labels, daemon output, and raw runtime/server errors remain untranslated.
- Batch 4D migrated provider/model selector chrome, provider catalog install modal, add-connection method modal, and paste-pairing-link modal. Provider/model/catalog names, provider descriptions, pairing URLs, protocol parser errors, daemon connection details, and raw runtime/server errors remain untranslated.
- Batch 4E migrated onboarding welcome chrome, direct-connection modal fields/actions/local failure guidance, QR scan permission/unavailable states, and desktop pair-device card. Pairing URLs, host/port placeholders, endpoint values, transport details, protocol parser errors, and raw runtime/server errors remain untranslated.
- Batch 4F migrated realtime voice overlay accessibility labels, rewind menu chrome and fallback toast, DiffViewer default empty state, and service URL chooser copy. Shortcut key names, raw daemon errors, diff contents, URLs, and caller-provided override labels remain untranslated.
- Batch 4G migrated the keyboard shortcuts help dialog to render section titles, row labels, and row notes through translation keys. Shortcut key names, shortcut combos, binding IDs, action IDs, and fallback registry labels remain untranslated.
- Batch 4H migrated Sessions screen chrome and AgentList local UI copy: date section headers, local status labels, fallback session titles, badges, load-more/empty states, and the archive action sheet. Agent titles, project paths, provider icons/labels, host labels, relative timestamps, and raw runtime data remain untranslated.
- Batch 4I migrated message utility chrome: image lightbox labels/errors, code and turn copy accessibility labels, dictation controls, question form fallback placeholders/actions, PlanCard fallback title, assistant image fallback errors, and todo list labels. Message bodies, plan text, todo item text, attachment labels, runtime dictation errors, and agent/tool output remain untranslated.
- Batch 4J migrated workspace tab toast/empty chrome: copy failure messages, copied labels, resume-command availability errors, reload-agent local status, host-disconnected wrapper reuse, and split-pane empty state. Agent IDs, generated resume commands, workspace paths, branch names, and raw reload errors remain untranslated.
- Batch 4K migrated sidebar/project list chrome: host picker fallback/search/title, footer actions and tooltips, Sessions row labels, mobile close label, New workspace tooltip/accessibility label, project-list empty states, and project settings host-load wrapper text. Host names, project names, workspace names, paths, branch names, and raw host errors remain untranslated.
- Batch 4L migrated picker/file/detail utility chrome: project picker states, branch switcher labels/placeholders, file pane loading/empty/fallback errors, tool-call details section/empty labels, and open-file accessibility. Directory paths, branch names, file contents, file sizes, tool details, and raw file-load errors remain untranslated.
- Batch 4M migrated hook/modal utility chrome: image attachment permissions/dialog/errors, copied toast wrappers, rename modal local validation/fallback errors, branch switcher stash/switch prompts and fallback toasts, and workspace setup local fallback errors. Copied labels supplied by callers, branch names, selected paths, raw dialog/API errors, and raw server errors remain untranslated.
- Batch 4N migrated pure view-model/policy utility chrome: import-session fallback titles/previews/empty states and the worktree setup callout. Provider labels and IDs remain runtime values interpolated into translated wrappers.
- Batch 4O migrated remaining small utility chrome: workspace route gate states/actions, compaction markers, archived-agent callout, web browser fallback, desktop quitting overlay, and image drop overlay. Host names, host status values, browser IDs, token counts, and raw route errors remain runtime values.
- Batch 4P migrated provider-selection pure view-model utility copy to direct `i18n.t(...)` calls and removed the local labels parameter path. Provider/model labels, provider IDs, and provider snapshot error messages remain runtime values.
- Batch 4Q migrated desktop update utility chrome: app update status text, update callout titles/actions, generic update errors, and install-error wrappers. Version labels, installer messages, raw update errors, release-channel data, and logs remain runtime values.
- Batch 4R migrated desktop permission utility chrome: permission status details, permission request fallback errors, empty permission statuses, and desktop notification test wrappers. Browser permission states, exception names, and raw browser API error messages remain runtime values.
- Batch 4S migrated desktop daemon settings chrome: built-in daemon status rows, daemon lifecycle toggles, logs/status modals, clipboard alerts, daemon management confirmations/errors, daemon status load errors, and desktop CLI/skills install wrapper errors. PIDs, log paths, log contents, CLI status output, version values, and raw IPC errors remain runtime values.
- Batch 4T migrated remaining attachment/autocomplete utility chrome: user and composer review attachment labels, workspace hover-card accessibility, branch stash restore prompts/toasts, agent autocomplete loading/empty/fallback error text, older-history fallback toast, draft panel labels, and agent-control fallback labels. PR/issue numbers, browser element tags, branch names, provider labels, model labels, agent prompts, command/file names, and raw server errors remain runtime values.
- Batch 4U migrated shared default utility chrome: Combobox and Autocomplete default placeholders/empty/loading labels, drag-overlay and subagent-track loading labels, sub-agent activity fallback headers, and file-preview fallback errors. Caller-provided labels, tab titles, subagent descriptions, file paths, and raw file-load errors remain runtime values.
- Batch 4V migrated Git policy action chrome to direct `i18n.t(...)` calls: commit/pull/push/sync/PR/merge/auto-merge/archive action labels, pending/success labels, and unavailable reasons. Branch/base refs, PR URLs, GitHub merge-state enum values, runtime statuses, and raw Git/GitHub errors remain runtime values.
- Batch 4W migrated remaining local wrapper states: workspace copy unavailable toasts, startup daemon-log loading/empty/load-failed text, and file-explorer workspace/host unavailable fallbacks. Workspace paths, branch names, daemon log contents/paths, checkout query details, and raw file/daemon errors remain runtime values.
- Batch 4X migrated descriptor and command chrome: Pair-device modal header, workspace setup sheet title, terminal panel fallback labels, command-center action titles, and file-pane host-disconnected fallback. Provider/catalog names, command-center search keywords, terminal runtime titles, file paths, and raw read errors remain runtime values.
- Batch 4Y tightened the translation boundary so React components and custom hooks use `useTranslation()` while pure helpers keep direct `i18n.t(...)` fallbacks, and migrated remaining small UI/accessibility fallbacks across message details, menu backdrops, startup errors, sidebar PR badges, settings/project accessibility labels, composer send/create/download fallbacks, client slash-command descriptions, terminal subscribe errors, and desktop update completion text. Provider catalog metadata, shortcut registry fallbacks, agent/daemon/protocol reasons, terminal contents, raw runtime errors, and user/project/workspace names remain untranslated.
- Batch 4Z expanded the supported locale set to the six UN official languages: Arabic, Chinese, English, French, Russian, and Spanish. Arabic, French, Russian, and Spanish now have full client-owned UI resource coverage, with key parity, fallback-ratio, and interpolation-placeholder tests guarding the generated translations. Arabic does not enable RTL layout direction in this batch.
- Batch 5A added Brazilian Portuguese (`pt-BR`) resource coverage, language selector labels, i18next registration, and system-locale mapping for `pt-BR` and bare `pt`. Non-Brazilian Portuguese regional locales remain unsupported until a matching resource is added.