This sounds very interesting. Being capable of working unconnected is the only way to get true privacy from these devices. Having them open sourced (hopefully 100% though I can understand the reasons for keeping some parts closed) would be even better. I have always been strongly opposed to networked voice assistants because the risk of them being used as spying tools by design is simply too high, And surely no Google, Amazon, Apple etc. assistant will never enter my home, but that one is a different beast. Keep up the good work!
I'm Italian. There are applications in the automotive field for a mostly disconnected device such as this one. If it can deal with a noisy environment like a car that would make it even more interesting.
ps. Please add other European languages soon :)