Fruzsina Vargha's main research area is dialectology, primarily using a quantitative approach. She examines patterns of linguistic similarity and the phonetic characteristics of dialects through dialectometric and acoustic phonetic methods. Formerly a staff member at the Institute of Hungarian Linguistics and Finno-Ugric Studies at ELTE Faculty of Humanities, she has been a researcher at the HUN-REN Hungarian Research Centre for Linguistics since January 2020. She has played a key role in numerous Hungarian dialect projects aimed at creating data repositories and digitizing dialect atlases. In recent years, alongside her work on linguistic variation, she has focused on developing the largest corpus of transcribed Moldavian Hungarian dialect recordings to date (moma.nytud.hu). A central goal of her work is to map and study databases created by lay content developers that highlight spatial linguistic variation, and to design value-centered research on dialect speech in collaboration with citizen researchers.

Since June 2025, she has served as the data steward at the HUN-REN Hungarian Research Centre for Linguistics. Her primary responsibilities include supporting researchers in planning and implementing proper data management, with special attention to the personal data of linguistic research participants, as well as mapping, documenting, and archiving (primarily audio) datasets from previous research in ways that ensure accessibility for current scholars.

“As a data steward, I see the greatest opportunity in mapping datasets created in past decades at my research institution that, although highly valuable to Hungarian cultural heritage, have since become uncurated—and advancing their proper storage and continued use."