Laleng - Tibeto-Burman ethnolinguistic group

"The Laleng, also known as the Patra are a small indigenous ethnolinguistic group primarily living deep in the forests of Sylhet District and Moulvibazar District in Bangladesh. They speak the endangered Laiunghtor language. There are diaspora communities in the Indian states of Assam and Meghalaya. Most people living in Sylhet are even unaware of the existence of this minority community, although their presence dates back centuries, as they choose to stay hidden in the deep forests. - Wikipedia"