Theravada
Theravada was founded in Nepal. It is relatively conservative, and generally closest to early Buddhist practice. For many centuries it has been the main religion of Sri Lanka (now about 70% of the population) and most of continental Southeast Asia (Cambodia, Laos, Myanmar, and Thailand). Theravada is also practiced  by minorities in parts of southwest China (by the Shan and Tai ethnic groups), Vietnam (by the Khmer Krom),  Bangladesh (by the ethnic groups of Baruas, Chakma, and Magh), Malaysia and Indonesia.