

I saw that some expressions do not have a Cantonese or Mandarin translation so I'm going to contribute on those:
-Welcome (歡迎)
Cantonese = fun yen
Mandarin = huānyíng
-Merry Christmas (聖誕節快樂)
Cantonese = sen dan chit fai lo
Mandarin = shèngdànjiékuàilè
-Congratulations (恭喜)
Cantonese = kon jei
Mandarin = gōngxi
I hope that this can help you and others. Remember, if I have mistaken please feel free to correct me!

Trans_ALEX'05