Journal of Arts and Humanities (JAH) 8 The Status of Nias Language Andi W. Polili 1 , Prof. Tengku S. Sinar 1 , Dr. Dwi Widayati 1 , Dr. Abdurrahman A. Syahputra 2 ABSTRACT The purpose of this study is to investigate the kinship relationship of the three languages spoken in North Nias, West Nias, and South Nias based on Swadesh 200 words by utilizing the lexicostatistics and glottochronology methods. The use of this language in the three districts of Nias certainly has a kinship relationship either of similar or different. Definitely, the derivation of this Austronesian language, Nias language, is reflected lexically in Nias language which is bequeathed either linearly or innovatively. The data collection of the three languages in North, West, and South of Nias is obtained from the informant interviews, observation and native informant speech recorded. Findings showed that the kinship of North Nias language and West Nias language by 91% with an estimated year- language category separation is between 164-170 (0-500) years ago, between the years 1846 to 1852. The results of the study also revealed that the kinship of North Nias language and South Nias language 86.5% year-language category with estimated separation is between 271-335 (0-500) years ago, between the years 1681 to 1745 and the kinship of West Nias category with estimated year separation is between 164-170 (0-500) years ago, between the years 1846 to 1852 (counting from 2016). Keywords: Lexicostatistic, Kinship Nias Language, Proto Austronesia. This is an open access article under Creative Commons Attribution 4.0 License. 1. Introduction The comparative historical linguistics or diachronic linguistics is a branch of linguistics discussing the kinship relationship between language and the equality of languages. Language and historical kinship is one specific area. The kinship relationship or the derivation found is abstracted in the form of the terminology. Additionally, it is implied that linguistic facts are formed as the basis of determining and proving of the kinship relationship. The fact of that linguistics describes the historical process of the relatives of those languages in the course of time. The trace and the interpretation of their language evolution symptoms in the past became the main feature of diachronic linguistics. After separating from protolanguage, every language develops even deviates in his way according to the environmental conditions. Differences in the human universe as a living language context determine the level of difference. Universe man is in the natural universe. Overall the various 1 Student in Linguistics Doctoral Program, University of North Sumatera. 2 Lecturer in Post Graduate Program of Bahasa Indonesia Education, State University of Medan. Journal of Arts & Humanities Volume 07, Issue 01, 2018, 08-22 Article Received: 03-11-2017 Accepted: 25-11-2017 Available Online: 30-01-2018 ISSN: 2167-9045 (Print), 2167-9053 (Online) DOI: http://dx.doi.org/10.18533/journal.v7i1.1123