$cache['lang_text'] = new sql_table($cache['db'], 'vmc_lang_text', array(
	new sql_column('en','text'),
	new sql_column('fr','text'),
));
var_dump($cache['lang_text']->generate_sql());

yields


string(112) "CREATE TABLE `vmc_lang_text` (
 `id` int(11) auto_increment,
`en` text null,
`fr` text null,
 PRIMARY KEY (id) )"