WMI
When the WMI method of the External Applications feature of AIDA64 Engineer is enabled, sensor values are written to the following WMI path:
Root\WMI\AIDA64_SensorValues
When AIDA64 exits, it removes that WMI path and all values under it. Temperatures are always in Celsius, regardless of the Fahrenheit display setting in AIDA64 Preferences. Sensor value labels are always in English, they're not localized.