private function _createSpecialWordTable()
    {
        // get l10n configuration for strings
        $config = $this->getConfiguration();

        // assume empty special word table
        $this->_specialWordTable = [];

        // iterate over predefined parts
        foreach ($this->_tags as $tag) {
            // create table
            $this->_specialWordTable[$tag] = $this->config->{$tag};
        }
    }