Great news, thanks!

I tried some words starting with umlauts – they don't seem to be in there or are buggy somehow: "Änderung", "Überraschung", "östlich" and some others I've forgotten since. When I swipe "ärger", it thinks the word starts with an L and suggests words like "lehrt".

The words "bösen", "böse" and "plötzlich" work, though. All in all it's still pretty useful.

For the non-germans:
I present to you a post with some funny words! Enjoy and try to say some of them out loud!