SOME LANGUAGE AND ETHNICITY INFORMATION
THE TRIBES OF VIETNAM
Number of Speakers: Approximately 59 million in 1970 (includes Vietnamese speakers within Cambodia, Laos, and China)
Northern Vietnamese (Tonkinese)
Central Vietnamese (High Annamese)
Southern Vietnamese (Cochinchinese)
and the minorities-
Literally within walking distance in some provinces between villiages, you could go from one language to another.