"Zhu ni sheng ri kuai le" - in Mandarin

生日快乐!

kk's and fanmy's answers are the same, I add the tones for you: 祝(zhù)你(nǐ)生(shēng)日(rì)快(kuài)乐(lè) or add my msn so I can send you the audio file

其实台语跟普通话写法都是一样就是祝你生日快乐可是怎么念就不一样了.. 台语是 "tsiok di xi dit kuai lok" 大慨是这样念的..coz there's no proper rules on how to spell out the way they pronounce using taiwanese unlike mandarin..Mandarin has proper letters and procedures on how to pronounce each of it which is called pinyin

台语的发音是不一样的 Taiwanese ：San leaz quiet lo