Important: #88045 - Locales dependencies configuration¶
See Issue #88045
Due to a bug in
TYPO3\CMS\Extbase\Utility\LocalizationUtility the configured dependencies for
a (custom) locale were not taken into account.
One could circumvent this bug by declaring the following configuration as a workaround:
$GLOBALS['TYPO3_CONF_VARS']['SYS']['localization']['locales']['dependencies'] = [ 'de_AT' => [ ['de'] ] ];
Since this bug now has been fixed, installations using these kinds of workaround need to update their configuration as described in the official documentation.