[1] Describe in detail the error you encountered.
If you want to enter a destination to GMaps in PIP using the voice input (this microphone)
it will only listen for English, even though the application is set to German.
If, however you use the microphone in GBoard (type into text field to bring up GBoard, then hit microphone in GBoard) it will understand German. Google Assistant also understands German. Only the voice input in PIP (circled microphone) is limited to English only.
[2] Provide screenshots of system information
[3] Whether the bug can be reproduced, reproduced is what the steps are
100% reproducible using the above steps.