Kingdom of Champasak
Subsequently, the Isan area was claimed by the Lao Kingdom of Champasak in 1718 and in 1893, the region became part of the Kingdom of Siam (Thailand) as a result of the Franco-Siamese War. Throughout this period, the Northern Khmer people shared the rural mountainous highlands with the Lao, Thai and various Mon-Khmer groups such as the Kuy, leading to a high degree of multilingualism. These varied influences and unique history have resulted in a distinct accent, with characteristics of the surrounding tonal languages, lexical differences through borrowing from Lao, Kuy and Thai, and phonemic differences in both vowels and distribution of consonants.