Toucan

A professional translation resource editor for developers and localization teams.

14 formats · 4 AI providers · translation memory · source code scanning · offline-first.

Toucan is a desktop i18n editor that handles every format your project uses — JSON, YAML, PO, RESX, Android XML, iOS .strings, XLIFF, ARB, CSV, TOML, INI, Java .properties, Laravel PHP, and Excel. It provides a unified workspace where you can translate, review, and validate all your language files without switching tools.

Built for Windows with WPF and Fluent Design (Mica backdrop, system theme).

Load and save 14 translation formats. Auto-detect framework on folder drop (i18next, Android, Flutter, .NET, iOS, Rails, Gettext, and more). Import from .babel projects.

• Editor — translate with inline suggestions and translation memory
• Review — approve/reject with validation warnings, auto-filters unapproved items
• Audit — read-only view with approval state and change history

Pre-translate using Google Translate, DeepL, Microsoft Translator, or OpenAI. Preview before applying. Preserves placeholders ({{var}}, {0}, %s, :param), respects formality settings, and supports per-key/namespace/language targeting.

Fuzzy matching with zero-allocation trigram engine. Reuses translations across projects. Suggests matches as you type.

6 built-in rules: missing translations, placeholder mismatches, duplicate keys, untranslated copies, empty values, whitespace mismatches. Runs on save and on-demand.

Scans your codebase for t('key') patterns across .tsx, .vue, .svelte, .py and more. Filter used/unused keys. Double-click opens the source file in your editor.

VS Code-style workspace: tree/list sidebar · translation editor (paginated or infinite scroll) · inspector panel (stats, suggestions, details, validation). Zen mode for distraction-free editing.

i18next _one/_other suffixes and ICU plural forms. Array values in JSON. Gender form generation.

Manage multiple translation sets per project (e.g., ui.json, errors.json, emails.json).

1. Download the latest release from GitHub Releases
2. Run the installer
3. Open a folder containing your translation files, or create a new project
4. Translate, review, save

Toucan auto-detects your framework and organizes files accordingly.

• Provider settings: App-level or project-level API keys, encrypted with DPAPI. See docs/provider-settings.md.
• Pre-translation preview: Dry-run mode with explicit commit step. See docs/pretranslation-preview.md.
• Default language: Set per-user in Settings → Options (default: en-US).

All 88 planned features complete. Focus on test coverage, performance profiling, and MSIX packaging.

• Auto-updater (stable/preview channels)
• ConsistencyAI (batch-check translations for tone, placeholders, accuracy)
• Enhanced translation memory (embedding-based similarity, inline ghost text, TMX import/export)
• CLI tool (toucan check, toucan translate, toucan export, toucan stats)

• Review workflow (Draft → Review → Approved → Published)
• Git integration (branch awareness, diff per key, auto-commit)
• Webhook notifications

• Avalonia port (macOS + Linux)
• Shared ViewModel layer

• Plugin system (.dll assemblies, custom formats, custom providers, custom validation rules)
• Platform imports (Crowdin, Lokalise, Phrase, Transifex)

See docs/todos/future-roadmap.md for full details.

• Report bugs or request features on GitHub Issues
• Pull requests welcome at github.com/rasyidf/Toucan

MIT © Rasyidf 2023–2026