Important: #81196 - LanguageService moved to core extension¶
See Issue #81196
The PHP class
TYPO3\CMS\Lang\LanguageService - very well known for being available as
$GLOBALS['LANG'] in the TYPO3 backend scope, and responsible for translating labels from
XLF/XML files, has been moved to EXT:core, the core system extension.
The new class is named
TYPO3\CMS\Core\Localization\LanguageService. A class alias for backwards-
compatibility is available, so the instantiating or referencing the old class name still works.
The class alias functionality will be dropped in TYPO3 v10.