Gérard Diffloth (born Châteauroux, 1939) is a retired linguistics professor, formerly of the University of Chicago, Chicago, Illinois, and Cornell University, Ithaca, New York. He received his Ph.D. from UCLA, after a dissertation on the Irula language. Diffloth is a leading specialist in the Austroasiatic languages. He is an advocate of immersion fieldwork in linguistic research.
Diffloth is known for his widely cited 1974 and 2005 classification of the Austroasiatic languages.
- Diffloth, Gérard. A History of the Khmer Language. [in preparation].
- Diffloth, Gérard. The Dvaravati Old Mon Language and Nyah Kur. Monic language studies, vol. 1. Bangkok, Thailand: Chulalongkorn University Print. House, 1984. ISBN 974-563-783-1
- Diffloth, Gérard. The Wa languages. Berkeley : Dept. of Linguistics, University of California, 1980.
- Diffloth, Gérard. An Appraisal of Benedict's Views on Austroasiatic and Austro-Thai Relations. Kyoto: Center for Southeast Asian Studies, Kyoto University, 1976.
- Diffloth, Gérard, and Zide, Norman H. Austroasiatic Number Systems. 1976.
- Diffloth, Gérard. Proto-Mon–Khmer Final Spirants. Kyoto: Center for Southeast Asian Studies, Kyoto University, 1976.
- Diffloth, Gérard. The Irula Language, a Close Relative of Tamil. Thesis—University of California, Los Angeles, 1968.
- Diffloth, Gérard. 2001. Les expressifs de Surin, et où cela conduit. Bulletin de l’Ecole française d’Extrême-Orient 88(1). 261–269. doi:10.3406/befeo.2001.3516. Page 262