Well...put it this way. France, The Netherlands and Germany are all near each other. Let's say we take one person from each of those countries and they all know how to speak French. If I were learning the language myself, I would consider the Frenchman speaking it as the proper way of speaking French. Likewise, I consider British English to be the proper form using the same reasoning. (England-English) I'm not saying we should give up unique terms, that would be wrong. (Aussie terms are the most colourful! :3) I'm saying the core of the language should be more like British English is all. Since you mentioned cars, that is another thing. Americans say "hood" and "trunk" other English countries use "bonnet" and "boot".