Ni Ketut Ratna Erawati  was born in Gianyar,  Bali, Indonesia on 7  March  1965.

The author completes a doctoral program in 2014 at Udayana university under the title of his dissertation, Valence in Old Javanese: A Morphosyntax Study. The preferred study is microlinguistics.

 Since 1993 until now is a lecturer at the Faculty of Cultural Sciences Udayana University. Functional positions are dipangku currently is the lector of the head in the field of linguistics, especially morphology Old Javanese language. Some of the most important scientific works and publications, namely Understanding Older Java Clauses and Text Sentences (berisbaru books); The Existence and Dynamics of Old Kuna Vocabulary in the present day Balinese society; Kausatif Typology Formal of Old Javanese Language; Medial Diathesis in Old Javanese; (Accredited national journal), and so on. In addition, active writers as speakers both international and national. Some of his articles include: Grammatization of Sanskrit Language Linguistics Units in Old Javanese; Phonological Variations Bentk Ingkar in Old Javanese, Adpositional in Old Javanese, etc.

The author is also active in some memberships,

 including “Masyarakat Linguistik Indonesia” (MLI) (Indonesian Linguistic Society); “Asosiasi Peneliti Bahasa-Bahasa Lokal” (APBL) (Association of Local Languages Researcher).