| Challenge: | Recent approaches to improving word-level quality scores on input source sentences require training special word-scoring models or require repeated invocation of the translation model. |
| Approach: | They propose to reason how well each word is explained by the target sentence as against the source language model and use it to translate into an unfamiliar target language. |
| Outcome: | The proposed method provides up to five points higher F1 scores and is significantly faster than the state of the art methods on three language pairs. |
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Are we Estimating or Guesstimating Translation Quality? (2020.acl-main)
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| Challenge: | A carefully engineered ensemble of pre-trained multilingual language models won the QE shared task at WMT19. |
| Approach: | They propose to use pre-trained multilingual language models to train quality estimation for machine translation. |
| Outcome: | A carefully engineered ensemble of pre-trained language models wins the QE shared task at WMT19. |
An Exploratory Analysis of Multilingual Word-Level Quality Estimation with Cross-Lingual Transformers (2021.acl-short)
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| Challenge: | Existing word-level quality estimation models require labelled data for each language pair and expensive maintenance. |
| Approach: | They propose to use multilingual QE models to generalise across languages . they propose to train models on other language pairs to predict word-level quality . |
| Outcome: | The proposed models generalise well across languages, making them more useful in real-world scenarios. |
Sentence Level Human Translation Quality Estimation with Attention-based Neural Networks (2020.lrec-1)
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| Challenge: | Existing methods for assessing translation quality rely on manual features and external knowledge. |
| Approach: | They propose to use a neural model without feature engineering to detect which parts in sentence pairs are most relevant for assessing quality. |
| Outcome: | The proposed model outperforms feature-based methods on a large human annotated dataset. |
Towards Modeling the Style of Translators in Neural Machine Translation (2021.naacl-main)
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| Challenge: | a key ingredient of neural machine translation is the use of large datasets with different but consistent translation styles . however, the models do not capture the variety of translators' styles from the data . a recent study shows that style-augmented models can capture the style variations of translator . |
| Approach: | They propose to augment a neural machine translation model with translator information . they use TED talk datasets to model and control translator-related stylistic variations . |
| Outcome: | The proposed models capture the style variations of translators and generate translations with different styles on new data. |
Bag-of-Words as Target for Neural Machine Translation (P18-2)
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| Challenge: | Existing neural machine translation models only use one correct sentence as the target, and the other correct sentences are punished as the incorrect ones. |
| Approach: | They propose an approach that uses both the sentences and the bag-of-words as targets in the training stage to encourage the model to generate the potentially correct sentences that are not appeared in the train set. |
| Outcome: | The proposed model outperforms baseline models on a Chinese-English translation dataset by the BLEU score of 4.55. |
Back-Translation Sampling by Targeting Difficult Words in Neural Machine Translation (D18-1)
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| Challenge: | Neural machine translation (NMT) uses a sequence-to-sequence model to generate synthetic data. |
| Approach: | They propose a method that adds synthetic data to sentences with high prediction loss during training and a variety of sampling strategies targeting difficult-to-predict words. |
| Outcome: | The proposed method improves translation quality by up to 1.7 and 1.2 Bleu points over back-translation using random sampling for German-English and English-German, respectively. |
Evaluating Language Translation Models by Playing Telephone (2025.emnlp-main)
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| Challenge: | Existing language models are inadequate for evaluating machine translation systems . current evaluation methods are costly and require specialized expertise to prepare and score gold standard translations . |
| Approach: | They propose an unsupervised method to generate training data for translation evaluation by repeated rounds of translation between source and target languages. |
| Outcome: | The proposed method outperforms a popular translation evaluation system on two tasks . human annotation is costly and requires specialized expertise to prepare and score gold standard translations . |
Bridging the Gap between Training and Inference for Neural Machine Translation (P19-1)
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| Challenge: | Neural Machine Translation generates target words sequentially while at inference it has to generate the entire sequence from scratch. |
| Approach: | They propose to use ground truth and inference to generate target words sequentially while at inference it has to generate the entire sequence from scratch. |
| Outcome: | Experiments on Chinese->English and WMT’14 English->German translation tasks show that the proposed model can achieve significant improvements on multiple datasets. |
Attention Focusing for Neural Machine Translation by Bridging Source and Target Embeddings (P18-1)
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| Challenge: | Neural machine translation uses source and target word embeddings to improve translation quality . source and targeted word embeds are at the two ends of a long information processing procedure . |
| Approach: | They propose a method to shorten the distance between source and target words in neural machine translation by bridging source and targeting word embeddings. |
| Outcome: | The proposed method shortens the distance between source and target words in neural machine translation and strengthens their association. |
Rethinking Document-level Neural Machine Translation (2022.findings-acl)
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| Challenge: | Neural machine translation models are weak enough for document-level translation . current models only translate sentences individually, resulting in poor document coherence . |
| Approach: | They propose to use the original Transformer model to test document-level neural machine translation . they find that the original transformer models can achieve strong results for document translation if trained properly . |
| Outcome: | The proposed model outperforms sentence-level models on nine datasets and two sentence- level datasets across six languages. |