The way people speak in old movies is often a source of amusement for modern audiences. There are several reasons for this. First, the vast majority of old movies were produced in the United States, and American English has changed a great deal over the last century. Secondly, the actors in those movies were often trying to imitate British accents, which were considered more refined and sophisticated at the time. Finally, many of those early films were intended for a international audience, and so the dialogue was written in a way that would be understandable to viewers from all over the world.