Hi there @dennisr1,
I do apologize that the plugin has not been working as expected but please do keep in mind we do our best to provide support here for a free plugin in an open forum.
I understand you are setting up a complex site that will be supporting multiple languages. It is true that MailPoet is not always the best choice for sites of this nature. We are not yet fully compatible with the typical language plugins including WPML, Polylang, and Loco Translate. There are many features of that plugin that do not work as expected with MailPoet at this time.
We continue to work towards full multi-language support as an internal project but as this is a complex scenario that affects a very small percentage of our customers, it is not a priority goal at this time.
So, to confirm:
- you can use the string setting box under MailPoet > Settings > WooCommerce to set the sign up string to **a specific, single other language**
- you can use the snippet we provided again, to change the sign up string to **a specific, single other language**
- you can take the snippet we provided and adapt it to work with multiple languages -> this would most likely take a developer who is familiar with the language checks introduced by your multi-language plugin
None of these solutions, however, will enable the ability for Loco Translate / WPML / Polylang to pick up this string and translate it for different contexts, as that integration simply does not yet exist in MailPoet.
Hope this is clear!