Custom messages in MailChimp don't work

Hi,

I have some issues with MailChimp footer widget.

I have already added it to the footer and tried to customize the message if user subscribe successfully. However my custom message is not appearing on website. I still have default success message (I think so), which is “Thank you for subscribing to our newsletter!” instead of the custom message defined in theme personalization.

Is it a bug or am I missing something?

Additionaly I have some other questions concerning translations. The first is about all the forms. My website is in polish and so is all the wordpress instance, however when user subscribe to the newsletter or tries to send a message via contact form, label on the button changes to the default “sending…” and I don’t see any possibility to provide a custom label.

The last thing is about the “load more…” button in portfolio grid. Is it possible to provide a custom label for it?

Best,
Marcin