"Settings" → "Smart Support" → "Voice Command".
You can also call your contacts only by pressing the volume down button.
More than one language in the system
If you want to set several languages on your Huawei P10 it is very simple. You just have to go to:
"Advanced settings" → "Language" → "Add a language".
Here you can choose several languages for your phone system by dragging it to the top of the list.
