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Providing quality scores along with Machine Translation (MT) output, so-called reference-free Quality Estimation (QE), is crucial to inform users about the reliability of the translation. We propose a model-specific, unsupervised QE…

Computation and Language · Computer Science 2024-04-30 Tu Anh Dinh , Tobias Palzer , Jan Niehues

Word-level quality estimation (QE) methods aim to detect erroneous spans in machine translations, which can direct and facilitate human post-editing. While the accuracy of word-level QE systems has been assessed extensively, their usability…

Computation and Language · Computer Science 2025-11-18 Gabriele Sarti , Vilém Zouhar , Grzegorz Chrupała , Ana Guerberof-Arenas , Malvina Nissim , Arianna Bisazza

Quality Estimation (QE) aims to assess the quality of machine translation (MT) outputs without relying on reference translations, making it essential for real-world, large-scale MT evaluation. Large Language Models (LLMs) have shown…

Computation and Language · Computer Science 2026-02-10 Archchana Sindhujan , Girish A. Koushik , Shenbin Qian , Diptesh Kanojia , Constantin Orăsan

Word-level Quality Estimation (QE) of Machine Translation (MT) aims to find out potential translation errors in the translated sentence without reference. Typically, conventional works on word-level QE are designed to predict the…

Computation and Language · Computer Science 2022-09-14 Zhen Yang , Fandong Meng , Yuanmeng Yan , Jie Zhou

Quality Estimation (QE) is an important component in making Machine Translation (MT) useful in real-world applications, as it is aimed to inform the user on the quality of the MT output at test time. Existing approaches require large…

It is expensive to evaluate the results of Machine Translation(MT), which usually requires manual translation as a reference. Machine Translation Quality Estimation (QE) is a task of predicting the quality of machine translations without…

Computation and Language · Computer Science 2022-04-19 Lei Lin

Quality Estimation (QE) is the task of predicting the quality of Machine Translation (MT) system output, without using any gold-standard translation references. State-of-the-art QE models are supervised: they require human-labeled quality…

Computation and Language · Computer Science 2023-07-14 Tu Anh Dinh , Jan Niehues

This work presents a novel approach to Automatic Post-Editing (APE) and Word-Level Quality Estimation (QE) using ensembles of specialized Neural Machine Translation (NMT) systems. Word-level features that have proven effective for QE are…

Computation and Language · Computer Science 2017-07-18 Chris Hokamp

Quality Estimation (QE) models for Neural Machine Translation (NMT) predict the quality of the hypothesis without having access to the reference. An emerging research direction in NMT involves the use of QE models, which have demonstrated…

Computation and Language · Computer Science 2025-06-03 Sai Koneru , Matthias Huck , Miriam Exel , Jan Niehues

Quality estimation aims to measure the quality of translated content without access to a reference translation. This is crucial for machine translation systems in real-world scenarios where high-quality translation is needed. While many…

Computation and Language · Computer Science 2021-02-09 Yi-Lin Tuan , Ahmed El-Kishky , Adithya Renduchintala , Vishrav Chaudhary , Francisco Guzmán , Lucia Specia

Quality Estimation (QE), the evaluation of machine translation output without the need of explicit references, has seen big improvements in the last years with the use of neural metrics. In this paper we analyze the viability of using QE…

Computation and Language · Computer Science 2023-11-10 Jan-Thorsten Peter , David Vilar , Daniel Deutsch , Mara Finkelstein , Juraj Juraska , Markus Freitag

This preliminary study investigates the usefulness of sentence-level Quality Estimation (QE) in English-Chinese Machine Translation Post-Editing (MTPE), focusing on its impact on post-editing speed and student translators' perceptions. It…

Computation and Language · Computer Science 2025-07-23 Siqi Liu , Guangrong Dai , Dechao Li

Simultaneous interpretation, translation of the spoken word in real-time, is both highly challenging and physically demanding. Methods to predict interpreter confidence and the adequacy of the interpreted message have a number of potential…

Computation and Language · Computer Science 2018-07-09 Craig Stewart , Nikolai Vogler , Junjie Hu , Jordan Boyd-Graber , Graham Neubig

Large Language Models (LLMs) have shown remarkable performance across a wide range of natural language processing tasks. Quality Estimation (QE) for Machine Translation (MT), which assesses the quality of a source-target pair without…

Computation and Language · Computer Science 2025-08-12 Archchana Sindhujan , Shenbin Qian , Chan Chi Chun Matthew , Constantin Orasan , Diptesh Kanojia

Neural machine translation systems estimate probabilities of target sentences given source sentences, yet these estimates may not align with human preferences. This work introduces QE-fusion, a method that synthesizes translations using a…

Computation and Language · Computer Science 2024-06-07 Giorgos Vernikos , Andrei Popescu-Belis

Quality estimation (QE) plays a crucial role in machine translation (MT) workflows, as it serves to evaluate generated outputs that have no reference translations and to determine whether human post-editing or full retranslation is…

Computation and Language · Computer Science 2026-03-13 Assaf Siani , Anna Kernerman , Ilan Kernerman

Traditional automatic evaluation measures for natural language generation (NLG) use costly human-authored references to estimate the quality of a system output. In this paper, we propose a referenceless quality estimation (QE) approach…

Computation and Language · Computer Science 2017-08-08 Ondřej Dušek , Jekaterina Novikova , Verena Rieser

Machine Translation (MT) Quality Estimation (QE) assesses translation reliability without reference texts. This study introduces "textual similarity" as a new metric for QE, using sentence transformers and cosine similarity to measure…

Computation and Language · Computer Science 2024-07-02 Kun Sun , Rong Wang

Quality Estimation (QE) metrics are vital in machine translation for reference-free evaluation and increasingly serve as selection criteria in data filtering and candidate reranking. However, the prevalence and impact of length bias in QE…

Computation and Language · Computer Science 2026-04-03 Yilin Zhang , Wenda Xu , Zhongtao Liu , Tetsuji Nakagawa , Markus Freitag

Large Language Models (LLMs) have demonstrated excellent performance on Machine Translation Quality Estimation (MTQE), yet their high inference costs make them impractical for direct application. In this work, we propose applying LLMs to…

Computation and Language · Computer Science 2026-03-12 Sidi Wang , Sophie Arnoult , Amir Kamran