Sets HasAccepted = 0 under Speech_OneCore\Settings\OnlineSpeechPrivacy for the current user. This is the 'Online speech recognition' privacy toggle: with it off, Windows stops sending your voice to Microsoft's cloud speech service for dictation/voice features. Offline/local speech recognition and the built-in Speech Recognition app still work. Reversible; revert restores the prior value.
MaxTweaks applies this tweak with one click and snapshots your original setting first, so you can revert it cleanly at any time. A System Restore point is offered before batch changes, and every tweak links to its official source.
Get MaxTweaksOfficial documentation: https://learn.microsoft.com/en-us/windows/privacy/manage-connections-from-windows-operating-system-components-to-microsoft-services