适合在婚礼上读的诗歌和祝福语应当表达对新人的美好祝愿，体现爱情的甜蜜和婚姻的神圣。以下是一些中文和英文的诗歌及祝福语，可以在结婚典礼上使用：

中文诗歌：

1. 《诗经·周南·关雎》

关关雎鸠，在河之洲。

窈窕淑女，君子好逑。

参差荇，左右流之。

窈窕淑女，寤寐求之。

求之不得，寤寐思服。

悠哉悠哉，辗转反侧。

参差荇，左右采之。

窈窕淑女，琴瑟友之。

参差荇，左右芼之。

窈窕淑女，钟鼓乐之。

2. 《长恨歌》节选 - 白居易

春宵苦短日高起，

从此君王不早朝。

承欢侍宴无闲暇，

春从春游夜专夜。

后宫佳丽三千人，

三千宠爱在一身。

金屋妆成娇侍夜，

玉楼宴罢醉和春。

3. 《鹊桥仙》 - 秦观

纤云弄巧，飞星传恨，银汉迢迢暗度。

金风玉露一相逢，便胜却人间无数。

柔情似水，佳期如梦，忍顾鹊桥归路！

两情若是久长时，又岂在朝朝暮暮。

中文祝福语：

1. 愿你们的爱情如同葡萄酒，越陈越香，幸福美满。

2. 愿你们手牵手，共同走过每一个春夏秋冬，直到永远。

3. 愿你们的婚姻像海洋一样深邃，像山岳一样坚固，像星星一样璀璨。

4. 愿你们相亲相爱，百年好合，永结同心。

5. 在这特别的日子，愿你们的爱情甜蜜如初，幸福长久。

英文诗歌：

1. "Sonnet 116" by William Shakespeare

Let me not to the marriage of true minds

Admit impediments. Love is not love

Which alters when it alteration finds,

Or bends with the remover to remove.

O no! it is an ever-fixed mark

That looks on tempests and is never shaken;

It is the star to every wandering bark,

Whose worth's unknown, although his height be taken.

2. "Because You Are My Love" by Elizabeth Barrett Browning

Because you are my love, my heart

Beats faster at the very sound of your name;

And all my being yearns to greet you,

As springs the earth when April rains fall down.

英文祝福语：

1. May your love grow stronger with each passing day, and may your life together be filled with joy, laughter, and happiness.

2. Wishing you a lifetime of love and happiness, and may your marriage be blessed with joy and contentment always.

3. As you embark on this journey together, may your love for each other deepen and your bond become unbreakable.

4. May your wedding day be the beginning of a beautiful lifelong journey, filled with love, companionship, and endless happiness.

5. On this special day, may your hearts be full of joy and your lives be full of happiness as you start your new life together.

总之，选择合适的诗歌和祝福语时，考虑新人的个性和喜好，以及婚礼的氛围和主题，可以使你的祝福更加贴心和有意义。