Change Like to Five! in P2 Likes plugin

p2-likes-to-fives.php

/**
 * Change text strings
 *
 * @link http://codex.wordpress.org/Plugin_API/Filter_Reference/gettext
 */
function p2_like2five( $translated_text, $text, $domain ) {
	if ( 'p2-likes' != $domain ) {
		return $translated_text;
	}
	switch ( $text ) {
		case 'Like' :
			$translated_text = __( 'Five!', 'p2-likes' );
			break;
		case 'Unlike' :
			$translated_text = __( 'Unfive!', 'p2-likes' );
			break;
	}
	return $translated_text;
}
add_filter( 'gettext', 'p2_like2five', 20, 3 );