Cuối, known as Thổ,[2] is a dialect cluster spoken by around 70,000 Thổ people in Vietnam and a couple thousand in Laos, mainly in the provinces of Bolikhamsai and Khammouane.
The consonant inventory of the Làng Lỡ dialect, as cited by Michel Ferlus:[3] There are eight tones in the Làng Lỡ.
Tones 7 and 8 are found on obstruent-final syllables (a.k.a.
'stopped' syllables), ending in -p -t -c -k.[3] This is a system comparable to that of Vietnamese.
The data is from Cuoi Cham vocabulary recordings and the Mon-Khmer Etymological Dictionary.