There are speech differences between the dialects spoken in Nepal and those in India. The lexical similarity of Kathariya Tharu is around 70%–76% with Dangaura Tharu and Rana Tharu, 66% with Hindi, 66%–69% with Buksa, 63% with Central Tharu, and 51%–59% with Kochila Tharu.[3][4][5]
In terms of linguistic characteristics, Kathariya Tharu follows an SOV (Subject-Object-Verb) word order, uses postpositions, and has a tendency for noun head final (unmarked). There has been some language shifting to Hindi, but Kathariya Tharu is still used by all, alongside Hindi and Nepali in the region.[3][4][5]
^ abcBoehm, Edward Daniel and Eichentopf, Stephanie and Mitchell, Jessica. 2012. A Sociolinguistic Study of Dangaura Tharu and Related Varieties. Central Department of Linguistics Tribhuvan University, Nepal and SIL International. vii+183pp.
^ abcDan Raj Regmi. 2015. Exploring relationships among the major Indo-Aryan languages of Tarai in Nepal. Nepalese Linguistics 30. 122-131.