Answer and Explanation:
unprejudiced discrimination
One possible term used to describe unknowingly discriminating against someone because of their culture is unprejudiced discrimination. This means that the person does not have any conscious bias or prejudice, but still engages in discriminatory behavior or language that is based on cultural stereotypes or norms. An example of this is using the word "gypped" to mean cheated or swindled, which is offensive to the Roma people.