Document Fallback.ToDefaultLanguage in IPublishedContent properties

[ronaldbarendse]

Description

The Fallbacks section of the IPublishedContent properties documentation was missing the Fallback.ToDefaultLanguage option.

This fallback policy (Fallback.DefaultLanguage enum value / Fallback.ToDefaultLanguage helper) was added in umbraco/Umbraco-CMS#13814 and shipped in Umbraco 11.3.0. It falls back to the value from the site's default language without requiring a specific culture to be specified.

Changes

Added a new ### Fallback to Default Language subsection to the Fallbacks section in all currently supported versions:

• 13/umbraco-cms/reference/querying/ipublishedcontent/properties.md
• 16/umbraco-cms/reference/querying/ipublishedcontent/properties.md
• 17/umbraco-cms/develop-with-umbraco/templating-and-rendering/querying/ipublishedcontent/properties.md
• 18/umbraco-cms/develop-with-umbraco/templating-and-rendering/querying/ipublishedcontent/properties.md

The API naming was verified against the Fallback struct in the CMS source.

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Pull request overview

Documents the Fallback.ToDefaultLanguage option in the IPublishedContent properties “Fallbacks” section, aligning the docs with the fallback policy introduced in the CMS and ensuring readers know how to use it across currently supported Umbraco versions.

Changes:

• Added a new “Fallback to Default Language” subsection describing the behavior and intent.
• Added a Razor example showing fallback: Fallback.ToDefaultLanguage usage.
• Applied the same documentation update consistently across v13, v16, v17, and v18 docs.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
18/umbraco-cms/develop-with-umbraco/templating-and-rendering/querying/ipublishedcontent/properties.md	Adds a “Fallback to Default Language” subsection with explanation and example in the Fallbacks section.
17/umbraco-cms/develop-with-umbraco/templating-and-rendering/querying/ipublishedcontent/properties.md	Same documentation addition for v17.
16/umbraco-cms/reference/querying/ipublishedcontent/properties.md	Same documentation addition for v16.
13/umbraco-cms/reference/querying/ipublishedcontent/properties.md	Same documentation addition for v13.

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