I don’t know any Spanish word, really, but I understand close to 80% of what she said (Being French helps a lot, since the two languages are closer than what I actually thought !)
And I’m quite saddened that she has to make such statements, about fans. She’s almost saying things like: “Okay guys, I know you love me that much, but please, knock it off, otherwise him and his family are going to see me as a troublemaker and the guilt will, indeed, be on me!”
That’s a little shocking. I can understand how much people love her but at least for a day, I think people could let her live the most perfect, memorable and beautiful day of her life in full serenity! I already see plenty of stressed out young ladies before getting married, they’re nervous, crying over nothing, hoping the best for that precise day. Let Utada just being able to think like: “Okay, now that I’m here, I can focus on my marriage, and not media + crazy fans spectators!”. That’s a lot to deal with, don’t you think?
In any case, she said: “I’d like to meet you on more appropriate circumstances!” Isn’t that great? xD

Now, I’m gonna read the message of the Fidanzato…

O.M.G. She found a living Prince. As we see on fairy tales!!! =O I'm sure... I hope... They're gonna be living a very happy life together! :P

Edit:
Waiiiiit! There was an English and Japanese version; okay I’m stupid right now x)
In any case, what I previously wrote stays even!
That’s a very clear, neat message as she always delivers to us. It feels just like I had a daughter and she’s getting married xD Like we were the noisy parents trying to hold back our hysteria for this event!