Localization (OrchardCore.Localization)Link

This module provides the infrastructure necessary to support the PO (Portable Object) localization file format. It also supports plural forms.

PO files locationsLink

PO files are found via the following steps:

  • For each module and theme all files matching [ModuleLocation]/App_Data/Localization/[CultureName].po
  • Then all files matching /App_Data/Localization/[CultureName].po
  • For each tenant all files matching /App_Data/Sites/[TenantName]/Localization/[CultureName].po

File formatLink

This article explains how PO files are organized, including plural forms.


Translation contextsLink

To prevent different PO files entries from overriding each other, entries define a context for each translation string. For instance two views could use the string named Hello but they might have different translation. It's then necessary to provide two entries and specify which context is associated with each translation. In this case each view name is a context.

From a ViewLink

The context string must match the view location up to the module folder.


Assuming the view's path is TheAdmin\Views\Layout.cshtml.

PO FileLink

msgctxt "TheAdmin.Views.Layout"
msgid "Hello"
msgstr "Bonjour"

From a ServiceLink

The context string must match the full name of the type the localizer is injecting in.


namespace MyNamespace
    public class MyService : IMyService
        public IStringLocalizer T { get; set; }

        public MyService(IStringLocalizer<MyService> localizer)
            T = localizer;

        public void DoSomething()

PO fileLink

msgctxt "MyNamespace.MyService"
msgid "Hello"
msgstr "Bonjour"


This module also provides support for pluralization. It is necessary to reference the OrchardCore.Localization.Abstractions package in order to be able to use it.

Sample PO fileLink

msgctxt "TheAdmin.Views.Layout"
msgid "1 book"
msgid_plural "{0} books"
msgstr[0] "[1 livre]"
msgstr[1] "[{0} livres]"


  • Import the using Microsoft.Extensions.Localization namespace.
  • Inject an instance of IStringLocalizer or IViewLocalizer (represented as the T variable in the following example).

T.Plural(count, "1 book", "{0} books")