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Framework Integration

Step-by-step setup for i18n-rosetta with popular frameworks.

Hugo (TOML / YAML / Markdown)​

Project Structure​

Hugo uses i18n/ for string translations and content/ for page content:

my-hugo-site/
├── i18n/
│   ├── en.toml             ← source of truth
│   ├── fr.toml
│   └── ja.toml
├── content/
│   ├── posts/
│   │   ├── hello.md        ← source (English)
│   │   ├── hello.fr.md
│   │   └── hello.ja.md
│   └── about.md
└── .env.local

Setup​

npm install --save-dev i18n-rosetta
i18n-rosetta.config.json
{
  "version": 3,
  "inputLocale": "en",
  "localesDir": "./i18n",
  "contentDir": "./content",
  "format": "auto",
  "languages": ["fr", "de", "ja", "es", "ko", "zh"]
}
i18n-rosetta sync           # sync i18n string files + content files
i18n-rosetta sync --dry     # preview changes without writing

Content Translation Details​

Front matter: Supports both YAML (---) and TOML (+++) delimiters. Translates title, description, summary, subtitle, caption, and linkTitle by default. All other fields (date, draft, tags, weight, slug, etc.) are preserved. Customize with translatableFields in your config.

Block protection: Code blocks, Hugo shortcodes, inline code, and raw HTML are automatically shielded using Unicode sentinel placeholders. They pass through untouched.

Filename convention: Follows Hugo's translation-by-filename pattern:

  • my-post.md → my-post.fr.md
  • my-post.en.md → my-post.fr.md (strips source suffix)

Skip existing: Existing translated files are never overwritten. Delete a target file to force re-translation.

Plural Forms​

TOML and YAML locales support CLDR plural forms:

[items]
one = "{{ .Count }} item"
other = "{{ .Count }} items"

Internally represented as items.one and items.other for diffing, then re-serialized to the correct sectioned format on write.