Jeonghyun Park

Graduate Student
Chung-Ang University
Seoul, Korea

I am a graduate student in the Department of Artificial Intelligence at Chung-Ang University, Seoul, Korea, advised by Prof. Hwanhee Lee.

My research focuses on multilingualism and Retrieval-Augmented Generation (RAG), tackling language bias and cross-lingual inconsistency. I am also interested in LLM agents and question answering.

For more details, please check my CV or reach me via email: tom0365@cau.ac.kr

Jul 2026:	Joined the Language Lab at LG AI Research as a Research Intern.
Apr 2026:	Two papers (DELTA, MARCH) accepted to ACL 2026 Findings.
Sep 2025:	Awarded a research grant for Translation-Free Strategies for Consistent Multilingual RAG (PI, 2025–2026).
Jun 2025:	Started a research collaboration with Adobe Research (w/ Dr. Seunghyun Yoon).
May 2025:	Our Investigating Language Preference accepted to ACL 2025 Findings.
Mar 2025:	Started my M.S. in the Dept. of AI at Chung-Ang University (LILAB).

^* Equal Contribution, ^† Corresponding Author

Enhancing Multilingual RAG Systems with Debiased Language Preference-Guided Query Fusion
Jeonghyun Park, Byeongjeong Kim, Seojin Hwang, Hwanhee Lee^†
ACL 2026 Findings
PDF| Abstract| Project| Code

MARCH: Evaluating the Intersection of Ambiguity Interpretation and Multi-hop Inference
Jeonghyun Park^*, Ingeol Baek^*, Seunghyun Yoon, Haeun Jang, Aparna Garimella, Akriti Jain, Nedim Lipka, Hwanhee Lee^†
ACL 2026 Findings
PDF| Abstract| Project| Code

Investigating Language Preference of Multilingual RAG Systems
Jeonghyun Park, Hwanhee Lee^†
ACL 2025 Findings
PDF| Abstract| Project| Code

Conversational Query Reformulation with the Guidance of Retrieved Documents
Jeonghyun Park, Hwanhee Lee^†
CMC-Computers, Materials & Continua, 2026
PDF| Abstract

Chronological Passage Assembling in RAG Framework for Temporal Question Answering
Byeongjeong Kim, Jeonghyun Park, J. Yang, Hwanhee Lee^†
CMC-Computers, Materials & Continua, 2025
PDF| Abstract

Cross-Lingual Summarization for Low-Resource Languages Using Multilingual Retrieval-Based In-Context Learning
Gyutae Park, Jeonghyun Park, Hwanhee Lee^†
Applied Sciences, 2025
Paper

Code-Switching Reveals Language Anchoring in Multilingual LLMs
Jeonghyun Park, Seunghyun Yoon, Yonghyun Jun, Hwanhee Lee^†
Culture x AI Workshop @ ICML 2026 / Under review, 2026
PDF| Abstract

Identifying and Mitigating Bottlenecks in Role-Playing Agents: A Systematic Study of Disentangling Character Profile Axes
Yonghyun Jun^*, Junhyuk Choi^*, Jeonghyun Park, Jihyeong Park, Liu Nicole Geumheon, Hwanhee Lee^†
FAGEN Workshop @ ICML 2026 / Under review, 2026
PDF| Abstract

Framing Matters: Addressing Framing Sensitivity in Decision-Making through Behaviorally-Grounded Value Alignment
Seojin Hwang, Minju Kim, Junhyuk Choi, Jeonghyun Park, Hwanhee Lee^†
Pluralistic Alignment Workshop @ ICML 2026 / Under review, 2026
PDF| Abstract

Beyond One Path: Evaluating and Enhancing Divergent Thinking in Interactive LLM Agents
Jihyeong Park, Ingeol Baek, Jeonghyun Park, Hwanhee Lee^†
Under review, 2026
PDF| Abstract

LG AI Research — Seoul, Korea

Research Intern @ Language Lab

Jul 2026 – Current
Adobe Research — San Jose, CA, USA

Collaborative Researcher @ Natural Language Processing Group (Remote)

Advisor: Dr. Seunghyun Yoon

Jun 2025 – Jun 2026
Chung-Ang University — Seoul, Korea

Research Intern @ Language Intelligence Lab (LILAB)

Advisor: Prof. Hwanhee Lee

Jul 2023 – Feb 2025
Chung-Ang University — Seoul, Korea

Research Intern @ Data Science Lab (DSLAB)

Advisor: Prof. Yoonsik Cho

Dec 2022 – Jun 2023

Chung-Ang University — Seoul, Korea

M.S. in Artificial Intelligence

Advisor: Prof. Hwanhee Lee

Mar 2025 – Current
Chung-Ang University — Seoul, Korea

B.S. in Artificial Intelligence

GPA: 4.20/4.50 (Major 4.29/4.50) · Graduated with Highest Honors

Mar 2021 – Feb 2025

Graduate Research Scholarship (GRS) — full tuition, Chung-Ang University

Mar 2025 – Current
Graduated with Highest Honors (GPA ≥ 4.2/4.5), Chung-Ang University

Feb 2025
Department Honor Scholarship (1st in cohort), Chung-Ang University

Mar 2024
Department Secondary Honor Scholarship (Top 10% in cohort), Chung-Ang University

Sep 2021, Sep 2024
Leadership Scholarship (Department Representative), Dept. of AI, Chung-Ang University

Sep 2022, Mar 2023, Mar 2024
Vice President Scholarship, Department Student Council, Dept. of AI, Chung-Ang University

Nov 2021 – Nov 2022
Excellence Award, 2022 SW·AI Startup Idea Competition (Da Vinci SW·AI Tech Fair)

Sep 2022

Investigating Language Preference of Multilingual RAG Systems

Korea Software Congress (KSC 2025), Yeosu, Korea

Dec 2025

Reviewer: EMNLP 2026

Embedded Artificial Intelligence

Teaching Assistant, Chung-Ang University

Fall 2024, Fall 2025

Plug-in External-Memory Models for Augmenting Knowledge of Large Language Models

National Research Foundation of Korea (Co-PI)

Next-generation RAG via plug-in external memory.

Sep 2025 – Current
Translation-Free Strategies for Consistent Multilingual Retrieval-Augmented Generation

National Research Foundation of Korea (PI)

Translation-free multilingual RAG that improves cross-lingual consistency without English pivoting.

Sep 2025 – Current
Next-Generation O2O Fashion Retail System: Personal Shoppers and Immersive Virtual Fitting

Ministry of Trade, Industry and Energy (Co-PI)

Developing a conversational fashion AI agent.

Jul 2025 – Current
Risk Assessment of Construction Sites based on LLMs

Doosan Enerbility (Co-PI)

Risk assessment and prediction with large language models.

Jun 2024 – May 2025