It doesn’t matter what language your UI is set to. Your scrapers need to be setup to pull links with a certain language. In Kodi you can do this and you may be able to with other apps. With Cinema I don’t think you can, but it’s been a long time since I’ve used Cinema, so I’m not sure.
Scrapers will pull sources from the entire internet, not just the country you are in. Many movies have multiple audio tracks. English may be one of the tracks, but not the primary or default audio track. This is why changing your settings is important.
If you want to use Kodi, I cover this and many other things in my video.