Sonos speaker off network

So I have a sonos speaker working with hubitat..
I only use it for tts and was wondering if there is away to take it off the internet and hubitat will still send it tts?

Your Sonos doesn't need internet access for TTS to work. LAN access will suffice.

However, since Hubitat makes use of Amazon Polly to encode TTS mp3s to play on Sonos, your Hubitat will need internet access.

So do my own recordings , store them on hubitat and give Lan access only to sonos.