Originally Posted by
findingitnecessary I found the solution. There is a separate setting for wifi/cellular download for speech services, from the Google play store wifi/cellular download.
Search "digital assistant app" in the settings search bar. Both gear icons in this menu, one at the top for which assistant is set for your device, and the bottom gear for speech services, both have options to change download via wifi/cellular.
"Default digital assistant app" gear icon, then "offline speech recognition" midway down, then "auto-update" tab on far right side.
"Voice input" "Speech services by Google" gear icon, then "auto update languages."
For those with xiaomi devices
Go to app settings, then manage app, then default settings, look for the assist and voice input.