group) Naic Ersuish, Qiangic, Rgyalrongic Lolo-Burmese Typology Word order Except for the Chinese, Bai, Karenic, and Mruic languages, the usual word order in Sino-Tibetan languages is object–verb. However, Chinese and Bai differ from almost all other subject–verb–object languages in the world in placing relative clauses before the nouns they modify. Most scholars believe SOV to be the original order, with Chinese, Karen and Bai having acquired SVO order due to the influence of neighbouring languages in the Mainland Southeast Asia linguistic area. This has been criticized as being insufficiently corroborated by Djamouri et al. 2007, who instead reconstruct a VO order for Proto-Sino-Tibetan. Morphology Sino-Tibetan is structurally one of the most diverse language families in the world, including all of the gradation of morphological complexity from isolating (Lolo-Burmese, Tujia) to polysynthetic (Gyalrongic, Kiranti) languages. While Sinitic languages are normally taken to be a prototypical example of the isolating morphological type, southern Chinese languages express this trait far more strongly than northern Chinese languages do. Hodgson had in 1849 noted a dichotomy between "pronominalized" (inflecting) languages, stretching across the Himalayas from Himachal Pradesh to eastern Nepal, and "non-pronominalized" (isolating) languages. Konow (1909) explained the pronominalized languages as due to a Munda substratum, with the idea that Indo-Chinese languages were essentially isolating as well as tonal. Maspero later attributed the putative substratum to Indo-Aryan. It was not until Benedict that the inflectional systems of these languages were recognized as (partially) native to the family. Scholars disagree over the extent to which the agreement system in the various languages can be reconstructed for the proto-language. In morphosyntactic alignment, many Tibeto-Burman languages have ergative and/or anti-ergative (an argument that is not an actor) case marking. However, the anti-ergative case markings can not be reconstructed at higher levels in the family and are thought to be innovations. Vocabulary External classification Beyond the traditionally recognized families of Southeast Asia, a number of possible broader relationships have been suggested. The "Sino-Caucasian" hypothesis of Sergei Starostin posits that the Yeniseian languages and North Caucasian languages form a clade with Sino-Tibetan. The Sino-Caucasian hypothesis has been expanded by others to "Dené–Caucasian" to include the Na-Dené languages of North America, Burushaski, Basque and, occasionally, Etruscan. A narrower binary Dené–Yeniseian family has recently been well received. The validity of the rest of the family, however, is viewed as doubtful or rejected by nearly all historical linguists. Around 1920 linguist Edward Sapir