Is there any way to translate Javascript? For example, when you go to the calculator at the prices page. Then it does translate first. But when you enter something at "Number of monthly website visitors" then the text changes and that text is not translated.
Also, please note that we currently are not able to provide support for custom work within this forum which will be required for translating something from inside Javascript. I however, tried to point you in the correct direction.
If my directions are not enough I suggest contacting one of our 3rd party contractors that specialise in custom work with WPML (https://wpml.org/contractors/) or a developer of your choice.