Translatepress is a plugin which adds multilanguage support to WordPress with an incredibly easy to use traslation feature directly on your blog frontend.
To make the multilanguage support by Newsletter uniform between different multilanguage plugins (Translatepress, WPML, Polylang and more) this extension adds a language switcher to the admin side when Translatepress is installed enabling the multilanguage configuration sets of Newsletter.
It adds of course the language support during subscription, cancellation, profile editing and the language-list linking feature of Newsletter to have a full translated user experience while interacting with Newsletter.
Please refere to the Newsletter multilanguage documentation page for details on how correctly use the multilanguage support.
Due to the nature of Translatepress, there is no support for translated post extration while composing a newsletter or on Automated extension.