Northern dialects are spoken in Sainyabuli, Bokeo, Phongsali, Luang Nam Tha, Udomxai, and Luang Prabang. Northeastern Lao is spoken mainly in Xiang Khoang and Houa Phan. Central Lao is found in Khammuan and Bolikhamsai. The Southern dialect is used in Champasak, Salavan, Savannakhet, Attapeu, and Sekong.