Sprachraum

In linguistics, a sprachraum (/ˈsprɑːkrm/; German: [ˈʃpʁaːxˌʁaʊm], "language area", plural sprachräume, German: [ˈʃpʁaχˌʁɔʏmə]) is a geographical region where a common first language (mother tongue), with dialect varieties, or group of languages is spoken.