1、生日快乐英文:happy birthday。
2、祝您生日快乐！Happy birthday to you!
3、其他说“生日快乐”的方法：All the best on your special day! 祝你在这特殊的日子里一切都好!
4、Have a great birthday! 祝你生日快乐!
5、I wish you a happier birthday than anyone else has wished you! 我祝你的生日比别人给你的生日更快乐!