Hi miskam, here's the code your need to insert language strings below. Save it as a separate file then insert it within your php block as an "include" for example:

// START
require_once( 'inc/header.inc.php' );
require_once( BX_DIRECTORY_PATH_INC . 'design.inc.php' );
echo _t( "_MY_LANGUIAGE_KEY" );
// END