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Wen Lai

8 accepted papers

2025

DCAD-2000: A Multilingual Dataset across 2000+ Languages with Data Cleaning as Anomaly Detection

NeurIPS 2025poster

The rapid development of multilingual large language models (LLMs) highlights the need for high-quality, diverse, and well-curated multilingual datasets. In this paper, we introduce DCAD-2000 (Data Cleaning as Anomaly Detection), a large-scale multilingual corpus constructed from newly extracted Com…

Cited by 0SourcecodeScholar
2025

From Unaligned to Aligned: Scaling Multilingual LLMs with Multi-Way Parallel Corpora

EMNLP 2025

Continued pretraining and instruction tuning on large-scale multilingual data have proven to be effective in scaling large language models (LLMs) to low-resource languages. However, the unaligned nature of such data limits its ability to effectively capture cross-lingual semantics. In contrast, mult

2025

Joint Localization and Activation Editing for Low-Resource Fine-Tuning

ICML 2025poster

Parameter-efficient fine-tuning (PEFT) methods, such as LoRA, are commonly used to adapt LLMs. However, the effectiveness of standard PEFT methods is limited in low-resource scenarios with only a few hundred examples. Recent advances in interpretability research have inspired the emergence of activa…

2024

LLMs Beyond English: Scaling the Multilingual Capability of LLMs with Cross-Lingual Feedback

ACL 2024findings

To democratize large language models (LLMs) to most natural languages, it is imperative to make these models capable of understanding and generating texts in many languages, in particular low-resource ones. While recent multilingual LLMs demonstrate remarkable performance in such capabilities, these…

2023

Mitigating Data Imbalance and Representation Degeneration in Multilingual Machine Translation

EMNLP 2023long findings

Despite advances in multilingual neural machine translation (MNMT), we argue that there are still two major challenges in this area: data imbalance and representation degeneration. The data imbalance problem refers to the imbalance in the amount of parallel corpora for all language pairs, especially…

Cited by 0SourcecodeScholar
2022

Improving Both Domain Robustness and Domain Adaptability in Machine Translation

COLING 2022main

We consider two problems of NMT domain adaptation using meta-learning. First, we want to reach domain robustness, i.e., we want to reach high quality on both domains seen in the training data and unseen domains. Second, we want our systems to be adaptive, i.e., making it possible to finetune systems…

2022

m4 Adapter: Multilingual Multi-Domain Adaptation for Machine Translation with a Meta-Adapter

EMNLP 2022finding

Multilingual neural machine translation models (MNMT) yield state-of-the-art performance when evaluated on data from a domain and language pair seen at training time. However, when a MNMT model is used to translate under domain shift or to a new language pair, performance drops dramatically. We cons…