Computer Configuration > Administrative Templates > Google Chrome > Accessibility settings
Both
HKLM\Software\Policies\Google\Chrome
Enable translation of live captions. Captions will be sent to Google for translation. If this policy is set to Enabled, Live Translate will always be turned on. If this policy is set to Disabled, Live Translate will always be turned off. If you set this policy as mandatory, users cannot change or override it. If this policy is left unset, Live Translate is disabled initially but can be enabled by the user anytime. In LiveCaptionEnabled is set to Disabled, Live Translate will be disabled regardless of this policy setting.