Making Sense of Korean Sentences: A Comprehensive Evaluation of LLMs through KoSEnd Dataset

Seunguk Yu, Kyeonghyun Kim, JungMin Yun, YoungBin Kim

Keywords: Sentence Ending, Agglutinative Language, LLM, Korean

TL;DR: We propose KoSEnd dataset and evaluate LLMs for understanding of Korean sentence endings.

Abstract: Although LLMs have made significant progress in various languages, there are still concerns about their effectiveness with low-resource agglutinative languages compared to languages such as English. In this study, we focused on Korean, a language known for its complex sentence endings, and evaluated LLMs on this challenging aspect. We introduce the Korean Sentence Endings (KoSEnd) dataset, which includes 3,000 sentences, each annotated for the naturalness of 15 sentence ending forms. These were collected from diverse sources to cover a range of contexts. We evaluated 11 LLMs to assess their understanding of Korean sentence endings, analyzing them based on parameter count and prediction consistency. Notably, we found that informing models about the possibility of missing sentence endings improved performance, highlighting the impact of explicitly considering certain linguistic features.

Archival Status: Archival

Paper Length: Long Paper (up to 8 pages of content)

Submission Number: 93