Guillaume Jacques & Alexis Michaud (2011)[1] argue for a Burmo-Qiangic branch of Sino-Tibetan (Tibeto-Burman) with two primary subbranches, Qiangic and Lolo-Burmese. Similarly, David Bradley (2008)[2] proposes an Eastern Tibeto-Burman branch that includes Burmic (a.k.a. Lolo-Burmese) and Qiangic. Bradley notes that Lolo-Burmese and Qiangic share some unique lexical items, even though they are morphologically quite different; whereas all Lolo-Burmese languages are tonal and analytical, Qiangic languages are often non-tonal and possess agglutinative morphology. However the position of Naic is unclear, as it has been grouped as Lolo-Burmese by Lama (2012), but as Qiangic by Jacques & Michaud (2011) and Bradley (2008).
Sun (1988) also proposed a similar classification that grouped Qiangic and Lolo-Burmese together.
Jacques' & Michaud's (2011) proposed tree is as follows.
Bradley's (2008) proposal is as follows. Note that Bradley calls Lolo-Burmese Burmic, which is not to be confused with Burmish, and calls Loloish Ngwi.
However, Chirkova (2012)[3] doubts that Qiangic is a valid genetic unit, and considers Ersu, Shixing, Namuyi, and Pumi all as separate Tibeto-Burman branches that are part of a Qiangic Sprachbund, rather than as part of a coherent Qiangic phylogenetic branch. This issue has also been further discussed by Yu (2012).[4]
Lee & Sagart (2008)[5] argue that Bai is a Tibeto-Burman language that has borrowed very heavily from Old Chinese. Lee & Sagart (2008) note that word relating to rice and pig agriculture tend to be non-Chinese, and that the genetic non-Chinese layer of Bai shows similarities with Proto-Loloish.
Branches
Yu (2012:206–207)[4] lists the following well-established coherent branches (including individual languages, in italics below) that could likely all fit into a wider Burmo-Qiangic group, in geographical order from north to south.
Additionally, Tangut, now extinct, is generally classified as a Qiangic language.
Yu (2012:215–218)[4] notes that Ersuic and Naic languages could possibly group together, since they share many features with each other that are not found in Lolo-Burmese or other Qiangic groups.
Proto-language reconstructions for some of these branches include:
^Chirkova, Ekaterina. 2008. On the Position of Baima within Tibetan: A Look from Basic Vocabulary. Alexander Lubotsky, Jos Schaeken and Jeroen Wiedenhof. Rodopi, pp.23, 2008, Evidence and counter-evidence: Festschrift F. Kortlandt. <halshs-00104311>
^ abSims, Nathaniel. 2017. The suprasegmental phonology of proto-Rma (Qiang) in comparative perspective. Presented at the 50th International Conference on Sino-Tibetan Languages and Linguistics, Beijing, China.
Bradley, David. 1997. "Tibeto-Burman languages and classification". In D. Bradley (Ed.), Tibeto-Burman languages of the Himalayas (Papers in South East Asian linguistics No. 14) pp. 1–71, Canberra: Pacific Linguistics. ISBN978-0-85883-456-9.
Bradley, David. 2008. The Position of Namuyi in Tibeto-Burman. Paper presented at Workshop on Namuyi, Academia Sinica, Taiwan, 2008.
Lama, Ziwo Qiu-Fuyuan (2012), Subgrouping of Nisoic (Yi) Languages, thesis, University of Texas at Arlington (archived)
Sūn, Hóngkāi 孙宏开. 1988. Shilun woguo jingnei Zang-Mianyude puxi fenlei 试论我国境内藏缅语的谱系分类. (A classification of Tibeto-Burman languages in China). In: Tatsuo Nishida and Paul Kazuhisa Eguchi (eds.), Languages and history in East Asia: festschrift for Tatsuo Nishida on the occasion of his 60th birthday 61–73. Kyoto: Shokado.