How to provide input field translations for a multi-lingual site?

I'm using the joomlamailer and mailchimpsignup modules with a joomla 3.6 multi-lingual website. I understand that the input fields are specified through the mailchimp.com web interface. I would like to have translations for these fields for each language that I have installed on the website. Do I need to create multiple email fields in the joomla web-app and have multiple sign up modules for each language to achieve this internationalization? Or how can I have the input text for these fields match the active website language? I have checked that there is only one mod_mailchimpsignup.ini in my "en-GB" language folder. How can I get the correct files for German and other languages?