At present, up to 15 ethnic languages, including as Bisu, Mpi, Saek, Kasong and Chong, are believed to be endangered, while tongues spoken in border areas such as Mon, Pattani Malay and Khmer Sung (northern Khmer) are also being forgotten. Even strong regional dialects such as those spoken in the North, South and Northeast are fast becoming "Thai-ised".