DNS and ip

Hi,

I have a vpn (openvpn with openwrt firmware) and I decided to try the dns 1.1.1.1 and cause of that, when I’m connected to France server, my IP geolocation is in france but the dns always appears in germany. So when I try to watch netflix with French libraries, I have the German language content. Also, since I use that dns, on my cell phone, when I’m outside of my wifi network, when I use my ISP internet service, my real ip has changed now…
Do you have an idea?
Thanks