Spanish sub labels translation

Any idea how to translate the sub labels when using advanced fields? I'm translating a page into Spanish and so far what's causing a issue is the English sub labels in the contact form, like under Name you have First and Last. I found WPML plugin and I have posted the same question in there support forum but I figure I try it here as well to see if anybody who's translated their form successfully.

Thanks.

Thanks for the quick response.

How do I go about translating? I've downloaded the files and uploaded them to the gravity forms language folder. I have a english form which I duplicated and translated the main labels into spanish.

Actually the way I set up Wordpress or my site is having the front page English and with a spanish button on the top that I created a new page that's in Spanish.

Link to site. I don't want a full spanish site.

EDIT: If you check out the form in the spanish version the sub fields are in English which I'm trying to convert to spanish. I found some hooks that I can probably do that with but those hooks affect the entire GForms plugin. WPML doesn't seem to be doing it's trick either.