t3lib_extMgm::addLLrefForTCAdescr('tx_example_customtable', 'EXT:example/Resources/Private/Language/locallang_db.xml');
t3lib_extMgm::addLLrefForTCAdescr('pages', 'EXT:example/Resources/Private/Language/locallang_pages.xml');This code adds a language file locallang_pages.xml for the system table pages in TYPO3. The language file is located in the Resources/Private/Language folder of the extension. Package Library: TYPO3 CMF (Content Management Framework)