UFOET2 Battle for Mercury had been delayed to September 2020.

And again, traditionally, it's been delayed again.

Currently without known ETA

Dangeet! I've been waiting for it.

Please, not here... Yes we know, even without seeing about, no bother telling it again, and again, forever.
Thanks for your useless share.

The banner was changed to release in spring 2021.
FB has them asking about people familiar with German and others to make language packs.