-function comment_type($commenttxt = 'Comment', $trackbacktxt = 'Trackback', $pingbacktxt = 'Pingback') {
+function comment_type($commenttxt = false, $trackbacktxt = false, $pingbacktxt = false) {
+ if ( false === $commenttxt ) $commenttxt = _x( 'Comment', 'noun' );
+ if ( false === $trackbacktxt ) $trackbacktxt = __( 'Trackback' );
+ if ( false === $pingbacktxt ) $pingbacktxt = __( 'Pingback' );