 However, the language is not widely used nor taught in any schools in Thailand, where many Lahu are in fact refugees and illegal immigrants, having crossed into Thailand from Myanmar.The Lahu language, along with the closely related Kucong language, is classified as a separate branch of Loloish by Ziwo Lama (2012), but as a Central Loloish language by David Bradley (2007).Lahu is classified as a sister branch of the Southern Loloish branch in Satterthwaite-Phillips' (2011) computational phylogenetic analysis of the Lolo-Burmese languages.