@kr2k @webdados we just wanted to verify the real problem and address it properly. This is a dynamic string that can be changed, and it presents a little bit of a problem with the way the translators work. Lets discuss a possible workaround.
Have you added a custom XML config in your settings area?
<wpml-config>
<admin-texts>
<key name="mailchimp-woocommerce">
<key name="newsletter_label"/></key>
</admin-texts>
</wpml-config>
Then you would have to match the string inside the string translation to be the same as the dynamically saved text in our plugin admin.
Once you’ve done this, you should be able to then add the translations at that point right? Please explain if we’re missing anything – but we’ve been able to do it exactly this way and so far it feels like the right way to get it handled.