This thread is resolved. Here is a description of the problem and solution.
Problem: MailChimp SignUp Form widget ignores the “display on language” dropdown, and displays on all languages.
Solution: Escalated to compatibility team. Workaround available (confirmed by the client): Mailchimp forms have a shortcode that can be used in post, page or widget. You can see in your form page, under the title.
- copy the shortcode - go to Appearance -> Widget - put a Text widget in the footer - paste the shortcode and add whatever text you want - set "display on language" for your form language - do the same for the other form (every form has a different shortcode; you need to change the language to see it)
This is the technical support forum for WPML - the multilingual WordPress plugin.