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Unsupervised machine translation (MT) has recently achieved impressive results with monolingual corpora only. However, it is still challenging to associate source-target sentences in the latent space. As people speak different languages…

Computation and Language · Computer Science 2020-05-08 Po-Yao Huang , Junjie Hu , Xiaojun Chang , Alexander Hauptmann

Machine translation systems achieve near human-level performance on some languages, yet their effectiveness strongly relies on the availability of large amounts of parallel sentences, which hinders their applicability to the majority of…

Computation and Language · Computer Science 2018-08-15 Guillaume Lample , Myle Ott , Alexis Conneau , Ludovic Denoyer , Marc'Aurelio Ranzato

Successful methods for unsupervised neural machine translation (UNMT) employ crosslingual pretraining via self-supervision, often in the form of a masked language modeling or a sequence generation task, which requires the model to align the…

Computation and Language · Computer Science 2021-04-15 Alexandra Chronopoulou , Dario Stojanovski , Alexander Fraser

Without real bilingual corpus available, unsupervised Neural Machine Translation (NMT) typically requires pseudo parallel data generated with the back-translation method for the model training. However, due to weak supervision, the pseudo…

Computation and Language · Computer Science 2019-01-15 Shuo Ren , Zhirui Zhang , Shujie Liu , Ming Zhou , Shuai Ma

We present a survey on multilingual neural machine translation (MNMT), which has gained a lot of traction in the recent years. MNMT has been useful in improving translation quality as a result of knowledge transfer. MNMT is more promising…

Computation and Language · Computer Science 2020-01-08 Raj Dabre , Chenhui Chu , Anoop Kunchukuttan

We investigate pivot-based translation between related languages in a low resource, phrase-based SMT setting. We show that a subword-level pivot-based SMT model using a related pivot language is substantially better than word and…

Computation and Language · Computer Science 2017-10-06 Anoop Kunchukuttan , Maulik Shah , Pradyot Prakash , Pushpak Bhattacharyya

Unsupervised neural machine translation (UNMT) that relies solely on massive monolingual corpora has achieved remarkable results in several translation tasks. However, in real-world scenarios, massive monolingual corpora do not exist for…

Computation and Language · Computer Science 2021-05-25 Haipeng Sun , Rui Wang , Kehai Chen , Masao Utiyama , Eiichiro Sumita , Tiejun Zhao

In this paper, we present our first attempts in building a multilingual Neural Machine Translation framework under a unified approach. We are then able to employ attention-based NMT for many-to-many multilingual translation tasks. Our…

Computation and Language · Computer Science 2016-11-16 Thanh-Le Ha , Jan Niehues , Alexander Waibel

The scarcity of parallel data is a major obstacle for training high-quality machine translation systems for low-resource languages. Fortunately, some low-resource languages are linguistically related or similar to high-resource languages;…

Most translation tasks among languages belong to the zero-resource translation problem where parallel corpora are unavailable. Multilingual neural machine translation (MNMT) enables one-pass translation using shared semantic space for all…

Computation and Language · Computer Science 2022-08-25 Jian Yang , Yuwei Yin , Shuming Ma , Dongdong Zhang , Shuangzhi Wu , Hongcheng Guo , Zhoujun Li , Furu Wei

While machine translation has traditionally relied on large amounts of parallel corpora, a recent research line has managed to train both Neural Machine Translation (NMT) and Statistical Machine Translation (SMT) systems using monolingual…

Computation and Language · Computer Science 2021-12-28 Mikel Artetxe , Gorka Labaka , Eneko Agirre

Unsupervised cross-lingual pretraining has achieved strong results in neural machine translation (NMT), by drastically reducing the need for large parallel data. Most approaches adapt masked-language modeling (MLM) to sequence-to-sequence…

Computation and Language · Computer Science 2021-06-11 Christos Baziotis , Ivan Titov , Alexandra Birch , Barry Haddow

While modern machine translation has relied on large parallel corpora, a recent line of work has managed to train Neural Machine Translation (NMT) systems from monolingual corpora only (Artetxe et al., 2018c; Lample et al., 2018). Despite…

Computation and Language · Computer Science 2021-12-28 Mikel Artetxe , Gorka Labaka , Eneko Agirre

Unsupervised neural machine translation(NMT) is associated with noise and errors in synthetic data when executing vanilla back-translations. Here, we explicitly exploits language model(LM) to drive construction of an unsupervised NMT…

Computation and Language · Computer Science 2019-11-12 Wei Zhang , Youyuan Lin , Ruoran Ren , Xiaodong Wang , Zhenshuang Liang , Zhen Huang

We present a survey on multilingual neural machine translation (MNMT), which has gained a lot of traction in the recent years. MNMT has been useful in improving translation quality as a result of translation knowledge transfer (transfer…

Computation and Language · Computer Science 2020-01-08 Raj Dabre , Chenhui Chu , Anoop Kunchukuttan

Unsupervised neural machine translation (NMT) is a recently proposed approach for machine translation which aims to train the model without using any labeled data. The models proposed for unsupervised NMT often use only one shared encoder…

Computation and Language · Computer Science 2018-04-25 Zhen Yang , Wei Chen , Feng Wang , Bo Xu

While end-to-end neural machine translation (NMT) has made remarkable progress recently, it still suffers from the data scarcity problem for low-resource language pairs and domains. In this paper, we propose a method for zero-resource NMT…

Computation and Language · Computer Science 2017-05-03 Yun Chen , Yang Liu , Yong Cheng , Victor O. K. Li

Unsupervised neural machine translation (UNMT) is beneficial especially for low resource languages such as those from the Dravidian family. However, UNMT systems tend to fail in realistic scenarios involving actual low resource languages.…

Computation and Language · Computer Science 2021-03-31 Sai Koneru , Danni Liu , Jan Niehues

Multilingual Neural Machine Translation (MNMT) models are commonly trained on a joint set of bilingual corpora which is acutely English-centric (i.e. English either as the source or target language). While direct data between two languages…

Computation and Language · Computer Science 2020-10-21 Markus Freitag , Orhan Firat

While recent neural machine translation approaches have delivered state-of-the-art performance for resource-rich language pairs, they suffer from the data scarcity problem for resource-scarce language pairs. Although this problem can be…

Computation and Language · Computer Science 2017-02-22 Yong Cheng , Yang Liu , Qian Yang , Maosong Sun , Wei Xu