What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
I'm not sure if I fully understand you but if you are looking on using the web builder in French, then you can check this article: http://www.jotform.com/help/55-JotForm-Languages. This is the specific link for the French version of the form builder: http://french.jotform.com/
If you are looking on how to make the form multilingual, you can check this guide: http://www.jotform.com/help/298-How-to-make-your-forms-multilingual.
Do let us know if you have additional questions on this.