- Khalkha, Khalka, Kalka - the Mongol people living in the central and eastern parts of Outer Mongolia
--1 is a kind of Mongol, Mongolian
- Khalkha, Khalka, Kalka - the language of the Khalkha people that is the official language of the Mongolian People's Republic
--2 is a kind of Mongolian, Mongolic, Mongolic language