Tranlate themes before members choce them

Hello, I have a multisite. In network admin, I put in lets say 10 differet themes for my members of this network to choose for, in their site.

Now my language is not English, so I would like to translate all 10 themes before my members choose and use them. How is this possible?

So my members woundt have to transate them, I´va already done that. Is this Possible?