WCPA is compatible with WPML(Wordpress Multi-lingual), the multi-language integration plugin.
Let's check how to integrate it to WCPA. First you have to install and activate WPML and it's supporting plugins(WPML Translation Management and WPML String Translation) before using it. And set up the essential settings as per the WPML documentation.
Step 1: Add a form in the base language with some fields. And click on the publish button.
Step 2: Change it into the language which you would like to translate by clicking on the '+' symbol near to the preferred language.
Or you have an alternative way to select the language. Select it from the toolbar of the Wordpress. Please see the figure below.
Step 3: It will give you a duplicate form of the original. It can be used to translate. Change the title and labels to the language you have selected. Click on publish button to save it.
Step 4: Assign the original form(the form which is created in base language) to the product. You can assign the form to the product only in the base language