Sawada (2017) lists the following patois (subvarieties) of Lhaovo.
Gyanno’ (autonym: kjɛn˧˥noʔ˨˩): spoken in the west side of the N'Mai River in Sawlaw Township.
Tho’lhang (autonym: tʰaʔ˨˩lo̰˨): spoken in Htawlang and a few other villages in northern Sawlaw Township.
Lakin (autonym: lăkɛ̰˨): spoken in Lakin village, northern Sawlaw Township.
Lhangsu (autonym: la̰ŋ˥˧su˥˧; not the same as Langsu 浪速 of Yunnan): spoken in the area between Hkrang Hka and Sanin Hka, which are two tributaries of the Mali Hka. It is spoken in Sumprabum Township, including in the villages of Hting Tsa, N-gawk Hkyet, and Ma Awng.
The Langsong 浪宋 are found in Zaoyang 早阳 in Yunlong County (in the Chinese province of Yunnan) as well as in Baocun 表村, Laomo 老末, and Sancha 三岔. They reportedly speak a highly endangered language that may be possibly related to Langsu.
戴 Dai, 慶廈 Qingxia (2005). 浪速语研究 Langsu Yanjiu [Study of the Maru Language] (in Chinese). Beijing: 民族出版社 Minzu Chubanshe. ISBN9787105068159.
Yabu Shirō 藪 司郎 (1988). "A preliminary report on the study of the Maru, Lashi and Atsi languages of Burma." Yoshiaki Ishizawa (ed.), Historical and cultural studies in Burma, 65-132. Tokyo: Institute of Asian Studies, Sophia University.