当然，以下是圣诞快乐的英文文案，字数超过120字：
Merry Christmas! May the spirit of the season fill your heart with joy and bring you peace. Let the sounds of the season fill your home with music and the smells of the season fill your home with warmth and love. May the meaning of the season bring you hope and the spirit of the season bring you peace. Enjoy the magic of the season and the beauty of the holiday. Merry Christmas to you and your family!
同样可以回答：
merry Christmas（就像别人对你说：圣诞快乐，你也回答：圣诞快乐。一个道理）。
或者也可以回答：
The same to you!
(也给你同样的祝福，但语境不如第一个回答，有点装B的嫌疑。
看电影里，通常会这样说——
Oh~`Thank you! Merry Christmas! My friend(或者别的什么称呼）。