MailChimp is a popular online service that allows you to distribute automated email campaigns. The integration between MailChimp for WordPress plugin and WPML allows you to translate sign-up forms and related messages.
To translate your Mailchimp forms, you need to download and activate MailChimp for WordPress plugin and then install our bridge plugin called MailChimp for WordPress Multilingual.
Additionally, you must have the following WPML plugins installed:
WPML Multilingual CMS
WPML Translation Management
WPML String Translation
You can download MailChimp for WordPress Multilingual from the following link:
Once downloaded, install and activate it just as you would any other WordPress plugin.