Download the trial of RS!Form or RS!Form Pro.

Don't know if either has the exact functionality you're looking for.

But once once you register, you can use their forum.

Their support ticket system is really good, even for trial users.

(I'm sure they would be able to tell you how to do what you want or help with the code.)

Along with the usual setup support questions I had, I got tons of help setting up multilingual forms.

Lots of info on their forum, too.

Cheers!

My number one priority when I first started looking for a contact form component was the ability to have forms in languages besides English, in particular mine had to be in Japanese.

I can't tell you how many components I downloaded, installed and configured only to find at some point even though most said they could handle Japanese, they couldn't.

From what I saw, they handles other languages well, just not Asian characters.

I'm almost sure I gave Breezing and ChronoForms a shot, though I can't say for sure.

In the end, RS!Form was the only one that could handle Japanese.

BEST features in RS!Forms so far:

The ability to copy forms, make one form and if you need one that varies slightly, you can just copy it. Such a great feature when you're making several forms that each need to be customized.

The ability to make a menu item for a form, or place it in an Article.

Terp,

You've been recommending that for quite some time now.
One of these days I'm gonna take a look at...
Does it handle double-byte characters?