sprachbund
group of languages that have become similar in some way because of geographical proximity and language contact
Mainland Southeast Asia linguistic area
geolinguistic region sharing areal features such as tonality
Standard Average European
group the modern Indo-European languages of Europe with shared common features
Ethiopian language area
sprachbund containing Ethio-Semitic, Cushitic and Omotic languages (but not Nilo-Saharan), geographically in modern Ethiopia and Eritrea
Linguistic areas of the Americas
Areas formed by indigenous languages of the Americas form various linguistic areas or Sprachbunds that share various common (areal) traits
Altaic
controversial supergroup of Turkic, Mongolic, Tungusic, Japanese, and Korean languages
Pueblo linguistic area
Linguistic area in the southwestern United States