生日快乐的英文翻译是happy birthday。

词汇分析

音标：英[ˈhæpi ˈbə:θdei] 美[ˈhæpi ˈbɚθˌde]

释义：生日快乐；华诞高兴

短语

Happy y birthday 生日快乐

Happy Lunar Birthday 农历生日快乐

Happy your birthday 生日快乐

Happy advance birthday to me 提前祝我生日快乐