VietMix: A Naturally-Occurring Parallel Corpus and Augmentation Framework for Vietnamese-English Code-Mixed Machine Translation

Fuente: arXiv
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Autori principali: Tran, Hieu, Nguyen-Le, Phuong-Anh, Nghiem, Huy, Nguyen, Quang-Nhan, Ai, Wei, Carpuat, Marine
Natura: Preprint
Pubblicazione: 2025
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author Tran, Hieu
Nguyen-Le, Phuong-Anh
Nghiem, Huy
Nguyen, Quang-Nhan
Ai, Wei
Carpuat, Marine
author_facet Tran, Hieu
Nguyen-Le, Phuong-Anh
Nghiem, Huy
Nguyen, Quang-Nhan
Ai, Wei
Carpuat, Marine
contents Machine translation (MT) systems universally degrade when faced with code-mixed text. This problem is more acute for low-resource languages that lack dedicated parallel corpora. This work directly addresses this gap for Vietnamese-English, a language context characterized by challenges including orthographic ambiguity and the frequent omission of diacritics in informal text. We introduce VietMix, the first expert-translated, naturally occurring parallel corpus of Vietnamese-English code-mixed text. We establish VietMix's utility by developing a data augmentation pipeline that leverages iterative fine-tuning and targeted filtering. Experiments show that models augmented with our data outperform strong back-translation baselines by up to +3.5 xCOMET points and improve zero-shot models by up to +11.9 points. Our work delivers a foundational resource for a challenging language pair and provides a validated, transferable framework for building and augmenting corpora in other low-resource settings.
format Preprint
id arxiv_https___arxiv_org_abs_2505_24472
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle VietMix: A Naturally-Occurring Parallel Corpus and Augmentation Framework for Vietnamese-English Code-Mixed Machine Translation
Tran, Hieu
Nguyen-Le, Phuong-Anh
Nghiem, Huy
Nguyen, Quang-Nhan
Ai, Wei
Carpuat, Marine
Computation and Language
Artificial Intelligence
Machine Learning
Machine translation (MT) systems universally degrade when faced with code-mixed text. This problem is more acute for low-resource languages that lack dedicated parallel corpora. This work directly addresses this gap for Vietnamese-English, a language context characterized by challenges including orthographic ambiguity and the frequent omission of diacritics in informal text. We introduce VietMix, the first expert-translated, naturally occurring parallel corpus of Vietnamese-English code-mixed text. We establish VietMix's utility by developing a data augmentation pipeline that leverages iterative fine-tuning and targeted filtering. Experiments show that models augmented with our data outperform strong back-translation baselines by up to +3.5 xCOMET points and improve zero-shot models by up to +11.9 points. Our work delivers a foundational resource for a challenging language pair and provides a validated, transferable framework for building and augmenting corpora in other low-resource settings.
title VietMix: A Naturally-Occurring Parallel Corpus and Augmentation Framework for Vietnamese-English Code-Mixed Machine Translation
topic Computation and Language
Artificial Intelligence
Machine Learning
url https://arxiv.org/abs/2505.24472