TYPO3 Core

• we add a new field type to the TCA of powermail field model
• we also want to add new csh for some fields
• so we try this command:

\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addLLrefForTCAdescr(
    'tx_powermail_domain_model_fields',
    'EXT:px_powermail/Resources/Private/Language/locallang_csh_tx_powermail_domain_model_fields.xlf'
);

• This didnt work and i dont know how!?

• But if we add this to ext_localconf.php it works fine:

$GLOBALS['TYPO3_CONF_VARS']['SYS']['locallangXMLOverride']['EXT:powermail/Resources/Private/Language/locallang_csh_tx_powermail_domain_model_fields.xlf'][] = 'EXT:px_powermail/Resources/Private/Language/locallang_csh_tx_powermail_domain_model_fields.xlf';

Is it not possible to add mutliple language files for "TCA_DESCR"???