Specifying the Sensor Parameter
The Google Maps API uses the browser’s preferred language setting when displaying textual information such as the names for controls, driving directions and labels on maps. In most cases, this is preferable; you usually do not wish to override the user’s preferred language setting. However, if you wish to change the Maps API to ignore the browser’s language setting and force it to display information in a particular language, you can add an optional language parameter.
The Maps API serves map tiles and biases application behavior, by default, using the country of the host domain from which the API is loaded (which is the USA for maps.google.com). If you wish to alter your application to serve different map tiles or bias the application (such as biasing geocoding results towards the region), you can override this default behavior by adding a region parameter.