The film was on Netflix at one point and that’s where I saw it.
It was in English.
Takes place in Ireland or Scotland.
Its about this couple who moves there, the women can’t have children and they are adopting from a nearby orphanage. Then her cow dies and she goes to burry it and finds a body with weird ritualistic things that make it obvious it’s sacrificed. Skip forward and there’s a man cult who get women pregnant and then 3 days after the child is born they sacrifice them to their god or whatever because they are super humans or so they think.