Lithuania can be divided into historical and cultural regions (called ethnographic regions). The exact borders are not fully clear, as the regions are not official political or administrative units. They are delimited by culture, such as country traditions, traditional lifestyle, songs, tales, etc. To some extent, regions correspond to the zones of Lithuanian language dialects. This correspondence, however, is by no means strict. For example, although the Dzūkian dialect is called South Aukštaitian, it does not mean that Dzūkija is part of Aukštaitija. In certain parts of some regions, dialects of other regions are spoken, while for example in Samogitia, there are three indigenous dialects (southern, northern and western Samogitian), some of which are subdivided into subdialects.