@lapcatsoftware I used a tip to switch the Siri language prior to the 15.1 -> 15.3.1 upgrade, and thankfully, it's still disabled for me.

I also disabled network connections before starting the update, and disabled the AI/Siri toggles in Screen Time -> Content Restrictions but I'm not sure if that affected anything.

I'm just beyond frustrated with Apple at this point that we need to worry about this at all, and that it downloaded AI models without my consent.