line($line[, $log_errors = TRUE])
lang($line[, $for = ''[, $attributes = array()]])
load($langfile[, $idiom = ''[, $return = FALSE[, $add_suffix = TRUE[, $alt_path = '']]]])
class CI_Lang load($langfile[, $idiom = ''[, $return = FALSE[, $add_suffix = TRUE[, $alt_path = '']]]])