The language of the Kassites was apparently a Celtic language.
 Other populous language families are the Dravidian languages of South Asia (among them Kannada, Tamil, and Telugu), the Turkic languages of Central Asia (such as Turkish), the Austroasiatic (among them Khmer), and TaiKadai languages of Southeast Asia (including Thai)
 Languages that belong to different families nonetheless often have features in common, and these shared features tend to correlate

