German derives most of its vocabulary from the Germanic branch of the Indo-European language family.[14] A portion of German words are derived from Latin and Greek, and fewer are borrowed from French and English. With slightly different standardized variants (German, Austrian, and Swiss Standard German), German is a pluricentric language. German is also notable for its broad spectrum of dialects, with many unique varieties existing in Europe and also other parts of the world.[2][15] Due to the limited intelligibility between certain varieties and Standard German, as well as the lack of an undisputed, scientific difference between a "dialect" and a "language",[2] some German varieties or dialect groups (e.g. Low German or Plautdietsch[5]) are alternatively referred to as "languages" and "dialects".[16]