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cms-core/Documentation/Changelog/12.3/Deprecation-99882-SiteLanguageTypo3LanguageSetting.rst
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.. include:: /Includes.rst.txt
.. _deprecation-99882-1675873624:
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Deprecation: #99882 - Site language "typo3Language" setting
===========================================================
See :issue:`99882`
Description
===========
A language configuration defined for a site has had various settings, one of
them being :yaml:`typo3Language`. The setting is used to define the language key which
should be used for fetching the proper XLF file (such as :file:`de_AT.locallang.xlf`).
Since TYPO3 v12 it is unnecessary to set this property in the site configuration
and it is removed from the backend UI. The information is now automatically
derived from the :yaml:`locale` setting of the site configuration.
The previous value "default", which matched "en" as language key is now unnecessary
as "default" is now a synonym for "en".
As a result, the amount of options in the user interface for integrators is
reduced.
Impact
======
An administrator cannot select a value for the :yaml:`typo3Language` setting anymore
via the TYPO3 backend. If a custom value is required, the site configuration
needs to be manually edited and the :yaml:`typo3Language` setting needs to be added.
If this is the case, please file a bug report in order to give the TYPO3
development team feedback on what use case is required.
However, saving a site configuration via the TYPO3 backend will still
keep the :yaml:`typo3Language` setting so no values will be lost.
Affected installations
======================
TYPO3 installations created before TYPO3 v12.3.
Migration
=========
No migration is needed as the explicit option is still evaluated. It is however
recommended to check if the setting is really necessary.
Examples:
#. If :yaml:`typo3Language: "default"` and :yaml:`locale: "en_US.UTF-8"`, the setting can be removed.
#. If :yaml:`typo3Language: "pt_BR"` and :yaml:`locale: "pt_BR.UTF-8"`, the setting can be removed.
#. If :yaml:`typo3Language: "de"` and :yaml:`locale: "de_AT.UTF-8"` , the setting can be removed,
plus the label files check for :file:`de_AT.locallang.xlf` and :file:`de.locallang.xlf`
as fallback when accessing a translated label.
#. If :yaml:`typo3Language: "pt_BR"` and :yaml:`locale: "de_DE.UTF-8"` it is likely
a misconfiguration in the setup, and should be analyzed if the custom value is really needed.
.. index:: YAML, NotScanned, ext:core