Marchian
The Marchian dialects are dialects of Low German, more precisely East Low German, spoken in Germany in the northern and western parts of Brandenburg as well as in northern Saxony-Anhalt.
The language area can be further divided into North-Markish and Middle-Markish.
The modern South-Markish dialects of southern Brandenburg and Berlin, however, are not Low German but Central German dialects. With the development of the Berlin metropolitan area, the original Low German Brandenburgish of Berlin developed into Berlinerisch, the local High German dialects, which today are considered an East Central German subgroup. The spread of High German into the Brandenburgish language area is an ongoing process.