@Txukie as i know google assistant doesn’t support spanish yet(at least, in current grpc api). In configuration, spanish is available in ‘recognition on command mode’ and ‘speech response of command mode’, not ‘google assistant mode’.
Now you have my full attention! :-)
Sounds exciting! Good luck with development!
Do you now jasper?
"Jasper is an open source platform for developing always-on, voice-controlled applications" https://jasperproject.github.io/
Maybe worth a look?
“Julius is a high-performance open source speech recognition engine. It does not need an active internet connection. Please note that you will need to train your own acoustic model, which is a very complex task that we do not provide support for. Regular users are most likely better suited with one of the other STT engines listed here.”
(from the documentation)