Where is translation for XML configurations is happening in the code?

Question

In XML files (such as system.xml) I can specify a translate attribute for nodes to be translated. Where is this translation taking place in the code?

Answer 1

There is no central place for all configuration structures. For tabs for example it happens in Mage_Adminhtml_Block_System_Config_Tabs::initTabs():

$helperName = $configFields->getAttributeModule($tab);
$label = Mage::helper($helperName)->__((string)$tab->label);