I am located in Switzerland. My MBP's system language is English. What's weird is that the date in the menu bar is displayed in German. Today it says "Samstag" instead of Saturday for example. The same thing happens in Finder as well. In the column "Date Created" it would say "heute" or "gestern" instead of "today" and "yesterday". While this is not a critical issue I am still wondering why this is and how I could change it.