I meant not about where these names would be visible [name:de], but from where you got this data. You wrote "Vgl. Orte in der umgebung" which I understood as "See places in the area". Which places?
BTW please use Polish or English in the changeset comments when you edit Poland.

Wrocław suburbs have no German names. Maybe they had before 1945. And if so, old_name:de is the right tag.