Question is in the title, unfortunately I don't have Netflix.
On DVD.
I think everyone or almost everyone is currently on Amazon Prime.
Here you can change the language + subtitles as far as I know.
On Amazon Prime, but unfortunately not for free.
I looked last week, it was still possible. But in German and whether it is still like that, I don't know either
Oh, it has recently started to cost something in Austria.
The films are free to watch on Amazon Prime (there's a free month). You can change languages and subtitles there.
Otherwise on DVD.
But not harry potter.
Yes, all Harry Potter parts are included in Amazon Prime.
I said that the films are available there
Everywhere you can watch it (on DVD, Amazon Prime, etc.) you should actually be able to choose the language in the menu.
OK sorry