Paper Signals / Google Assistent not recognizing commands

Question

We are building a Paper Signal:

While anything else has worked as expected, the Google Assistent doesn't recognize the words "Talk to Paper Signals" and "Create a new Paper Signal" as described here. Has anyone experienced similar issues? Our default language is German.

How can I activate an Action for the Paper Signals if not by the command?

Answer 1

The problem was that only Google Assistent for English(US) was able to understand the commands, even English(DE) didn't work.