RSVP is four letters you see on an invitation. They ask you to say whether you are coming — yes or no, not just a smile.

RSVP is four lettersRSVP是四個字母 you see on an invitation你會在請帖上看到。They ask you to say whether you are coming它是要你回覆你到底來不來 — yes or no, not just a smile是要或不要的答案，不是笑一笑帶過。

They were taken as a set of letters from French répondez s'il vous plaît, which is ‘reply, if you please.’ In English we almost always write RSVP and say the four letters; we do not say the French sentence. People also use it as a verb: ‘Please RSVP by Friday’ means please tell us by Friday if you will come.

They were taken as a set of letters from French répondez s'il vous plaît這四個字母是取自法文répondez s'il vous plaît, which is 'reply, if you please.'意思是「敬請回覆」。In English在英文裡, we almost always write RSVP and say the four letters我們幾乎都是寫RSVP、唸這四個字母; we do not say the French sentence不會去唸那句法文。People also use it as a verb它也可以當動詞用: 'Please RSVP by Friday'像'Please RSVP by Friday' means please tell us by Friday if you will come意思是請在星期五之前告訴我們你來不來。

Though actually, some people treat RSVP as ‘please come’ — that is not what it means. The host still needs the reply, including no. In Taiwan, wedding cards often write 敬請回覆 or the letters RSVP; both are understood.

Though actually不過其實, some people treat RSVP as 'please come'有些人把RSVP當成「請一定要來」 — that is not what it means但那不是它真正的意思。The host still needs the reply主人還是需要一個回覆, including no就算是「不去」也一樣。In Taiwan在台灣, wedding cards often write 敬請回覆 or the letters RSVP婚禮喜帖上常常會寫「敬請回覆」，或是直接寫RSVP這幾個字母; both are understood兩種寫法大家都看得懂。