WPML Gravity Forms Multilingual Addon

Download WPML Gravity Forms Multilingual Addon
WPML lets you create one set of forms with in the original language. Then you only need to translate the texts that appear in these forms to other languages in your site. WPML will automatically display the form in the correct language. Since the same form is used for all languages any changes you apply to it will instantly be visible in all languages.

Demo Link : https://wpml.org/documentation/related-projects/gravity-forms-multilingual/

Summary from Demo
WPML lets you translate the texts that appear in your Gravity Forms to other languages on your site. Once translated the form displays in the correct language on the front-end automatically.
Form in the default language
Form translated to secondary language
Start by installing and activating the following plugins:
If you’re new to WPML check out our Getting Started Guide. It quickly walks you through different translation options you can use.
Before translating your forms make sure that the No-Conflict Mode setting is turned off on the Forms → Settings page. When this option is enabled you cannot translate the form using the language switcher in the top admin bar.
Edit the form you want to translate and hover over the language switcher. Here you can specify which language the form should be in and you can send the form for translation into another language.
Clicking Send to translation opens Translation Management and filters the available content to show only Gravity Forms.
You can also access this list by going to WPML → Translation Management and selecting Gravity Form from the dropdown menu.
To send the form for translation:
Now go to WPML → Translations and click the Translate button for the job related to your form.
You’re taken to the Advanced Translation Editor where you can translate your form. You can use the built-in automatic translation for quick and easy translation.
That’s it your form is now translated and you can use it in posts and pages.
Once the form is translated all you need to do is insert it into any page using the Gravity Forms block.
Then simply make sure to translate that page as well.
As users visit the page in the secondary language WPML will automatically display the form in the correct language.
If you update the default language form by adding deleting or updating any of the content you will need to update the translated versions.
Certain types of fields in Gravity Forms include multiple choices that users select like Drop Downs and Radio Buttons. Changing the position of options in multiple-choice fields that have already been translated may result in those fields losing their translations. In this case you need to translate these fields again.
To update the translation of a form or translate new content that you added to the form follow these steps:
Please note that the Gravity Forms plugin does not detect a language of contents submitted in a form. When you submit content into a translated form that content will still be created in the default language.
You can use Gravity Forms hooks and filters to write your own application logic and set the language of the submitted content after Gravity Forms creates it.
To delete a form’s translations go to WPML → Packages and choose Gravity Forms from the dropdown menu. Select and delete the package that matches the name of the relevant form.
If you want to translate the form again later and don’t see it in WPML → Translation Management simply re-save the form.
In case you need help translating your site built using Gravity Forms and WPML visit WPML’s support forum.