宝宝生日快乐的英文是Happy birthday，baby！；生日快乐：happy birthday。；例：；

1、Happy birthday to you! ；祝您生日快乐！；

2、Happy Birthday! ；生日快乐！；

3、Happy birthday, sweetheart. ；生日快乐，亲爱的。；

4、He piped "happy birthday" on the cake. ；他在蛋糕上镶上了“生日快乐”的字样。