Lingo.dev + .yaml (Rails)

Lingo.dev CLI translates Ruby on Rails YAML i18n files using locale-based root keys for Rails' standard internationalization workflow. The CLI manages all Rails translations in centralized locale files, maintains Rails' nested key conventions for models/views/controllers, ensures YAML anchors and aliases work across locales, integrates seamlessly with Rails' t() helpers, and follows Rails i18n best practices exactly.

Quick Setup

Configure for Rails locale files:

{
  "locale": {
    "source": "en",
    "targets": ["es", "fr", "de"]
  },
  "buckets": {
    "yaml-root-key": {
      "include": ["config/locales/*.yml"]
    }
  }
}

Translate Rails i18n Files

npx lingo.dev@latest i18n

Manages Rails locale-specific content under root keys while preserving YAML structure and Rails i18n conventions.

Rails i18n Structure

Standard Rails Organization

# config/locales/en.yml
en:
  hello: "Hello world"

  # Model translations
  activerecord:
    models:
      user: "User"
      post: "Post"
    attributes:
      user:
        name: "Name"
        email: "Email Address"

  # View translations
  layouts:
    application:
      title: "My Rails App"

  # Controller/action specific
  users:
    index:
      title: "All Users"
      new_user: "New User"
    show:
      edit: "Edit User"
      delete: "Delete User"

es:
  hello: "Hola mundo"

  activerecord:
    models:
      user: "Usuario"
      post: "Publicación"
    attributes:
      user:
        name: "Nombre"
        email: "Dirección de Correo"

  layouts:
    application:
      title: "Mi Aplicación Rails"

  users:
    index:
      title: "Todos los Usuarios"
      new_user: "Nuevo Usuario"
    show:
      edit: "Editar Usuario"
      delete: "Eliminar Usuario"

Rails Validation Messages

en:
  activerecord:
    errors:
      messages:
        blank: "can't be blank"
        too_short: "is too short (minimum is %{count} characters)"
        too_long: "is too long (maximum is %{count} characters)"
        taken: "has already been taken"

es:
  activerecord:
    errors:
      messages:
        blank: "no puede estar en blanco"
        too_short: "es demasiado corto (mínimo %{count} caracteres)"
        too_long: "es demasiado largo (máximo %{count} caracteres)"
        taken: "ya está en uso"

Rails Integration Features

Helper Method Compatibility

Works seamlessly with Rails i18n helpers:

• t('users.index.title')
• I18n.t('hello')
• <%= t('.edit') %> (lazy lookup)
• User.model_name.human

Interpolation Support

en:
  welcome_message: "Welcome, %{name}!"
  items_count:
    zero: "No items"
    one: "One item"
    other: "%{count} items"

es:
  welcome_message: "¡Bienvenido, %{name}!"
  items_count:
    zero: "Sin artículos"
    one: "Un artículo"
    other: "%{count} artículos"

Advanced Configuration

Multiple Rails Locale Files

"yaml-root-key": {
  "include": [
    "config/locales/*.yml",
    "config/locales/**/*.yml"
  ]
}

Lock Rails System Keys

"yaml-root-key": {
  "include": ["config/locales/*.yml"],
  "lockedKeys": ["number", "time", "date", "datetime"]
}