A vocabulary tree node based on l10nvocabulary or l10nxvocabulary directory. These schemas store translations in
columns of the form label_xx_XX or label_xx. The label of a node is retrieved from column label_xx_XX (where xx_XX is
the current locale name) if it exists, from column label_xx (where xx is the current locale language) else. If this
one doesn't exist either, the english label (from label_en) is used.