Hi,
Just writing to let you know that I’m also having troubles with mailchimp+WPML after mailchimp (major) update.
I have asked WPML Support service and after checking my site they have confirmed that the new version of mailchimp widget (3.x.x) is not fully compatible with WPML.
In my case, the problem is related to the sign-up form included in my site. All the texts of the sign-up form are always shown in English, although translations to Spanish have been provided and completed using WPML String translation.
The translation worked OK before updating mailchimp widget, but now the widget content is not updated after choosing Spanish language in the language switcher.
This is an important issue for multilingual sites, so thanking you in advance for doing your best to solve this bug as soon as possible.
If I can help somehow from my side, please let me know.
Kind regards