Orchard Core Localization

Use OrchardCore.Localization for UI localization and OrchardCore.ContentLocalization for translated content items. Configure the default and supported cultures in the site settings UI or with a root recipe:

{
  "steps": [
    {
      "name": "Feature",
      "enable": [
        "OrchardCore.Localization",
        "OrchardCore.ContentLocalization",
        "OrchardCore.Localization.AdminCulturePicker"
      ]
    },
    {
      "name": "Settings",
      "LocalizationSettings": {
        "DefaultCulture": "en-US",
        "SupportedCultures": ["en-US", "fr-FR"],
        "FallBackToParentCulture": true
      }
    }
  ]
}

The localization module uses these settings to configure request localization. Do not invent an OrchardCore_Localization_CultureProvider configuration section.

In Orchard Core 3.0, ILocalizationService exposes culture lookup through an instance service method. Do not call a static default implementation. PoParser is static; use PoParser.Parse or PoParser.ParseAsync for PO file parsing.

UI Strings

Use the localizer typed to the class that owns the string:

private readonly IStringLocalizer<MyController> _localizer;

public MyController(IStringLocalizer<MyController> localizer)
{
    _localizer = localizer;
}

In Liquid, use the t filter:

{{ "Welcome to our site" | t }}
{{ "Hello {0}!" | t: User.Identity.Name }}

PO Contexts and Locations

The PO msgctxt must exactly match the localizer scope:

• {Namespace}.{Class} for IStringLocalizer<T>
• {Namespace}.{ViewPath} for a Razor view

msgctxt "MyModule.Controllers.HomeController"
msgid "Welcome to our site"
msgstr "Bienvenue sur notre site"

msgctxt "MyModule.Views.Home.Index"
msgid "Read more"
msgstr "Lire la suite"

For fr-CA, the provider checks these locations in order:

1. {Extension}/Localization/fr-CA.po
2. /Localization/fr-CA.po
3. App_Data/Sites/{tenant}/Localization/fr-CA.po
4. /Localization/{ExtensionId}/fr-CA.po
5. /Localization/{ExtensionId}-fr-CA.po
6. /Localization/fr-CA/{ExtensionId}.po, then each .po in that culture folder

Content and Admin Culture Pickers

LocalizationPart links translations with LocalizationSet and stores each item's Culture. The content culture picker is a separate content-localization feature. OrchardCore.Localization.AdminCulturePicker instead adds a navbar shape in the admin area when more than one supported culture is configured; it uses the admin culture cookie provider and does not render a front-end picker.