Just to give you some feedback…regarding the new german freePBX language pack.
I just tested one thing…which is…
When I press the message button on my phone, the lady says “Sie haben NEIN Nachrichten”, which is the direct translation from “you have no messages”…but this sounds very, very weird in German.
The correct sentence would be “Sie haben KEINE Nachrichten”.
So I switched back to my asterisk german voice prompts
from here https://www.asterisksounds.org/de/download
…they work best…