Using verbal command open/close instead of on/off in for example curtain control

Is there a way , when using Google assistance, to give an open / close command to some type of devices instead of On/off?

On / off works on my curtains but is sounds silly.
Would be nice to be able.to.say open/close.

You can try to create a “routine” in google home for it. Then you can type there what you want to say and the command Google Home has to execute.
However, routines are only available in the English language for now afaik.