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Localization (OrchardCore.Localization)

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

Online translations


The localization files for the different cultures are available on Crowdin.

PO files locations

PO files are found at these locations:

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

[CultureName] can is either the culture neutral part, e.g. fr, or the full one, e.g. fr-CA.


  • /App_Data/Localization/fr.po
  • /App_Data/Localization/fr-CA.po
  • /App_Data/Localization/es-MX.po

File format

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

Translation contexts

To prevent entries in different PO files from overriding each other, they 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 View

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


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

PO File

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

From a Service

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 file

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 file

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")