← Search

Ondřej Bojar

12 accepted papers

2025

MockConf: A Student Interpretation Dataset: Analysis, Word- and Span-level Alignment and Baselines

ACL 2025long

In simultaneous interpreting, an interpreter renders the speech into another language with a very short lag, much sooner than sentences are finished. In order to understand and later reproduce this dynamic and complex task automatically, we need specialized datasets and tools for analysis, monitorin…

2024

Evaluating the IWSLT2023 Speech Translation Tasks: Human Annotations, Automatic Metrics, and Segmentation

COLING 2024main

Human evaluation is a critical component in machine translation system development and has received much attention in text translation research. However, little prior work exists on the topic of human evaluation for speech translation, which adds additional challenges such as noisy data and segmenta…

Cited by 1SourcePDFScholar
2024

Khan Academy Corpus: A Multilingual Corpus of Khan Academy Lectures

COLING 2024main

We present the Khan Academy Corpus totalling 10122 hours in 87394 recordings across 29 languages, where 43% of recordings (4252 hours) are equipped with human-written subtitles. The subtitle texts cover a total of 137 languages. The dataset was collected from open access Khan Academy lectures, benef…

Cited by 0SourcePDFScholar
2023

Assessing Word Importance Using Models Trained for Semantic Tasks

ACL 2023findings

Many NLP tasks require to automatically identify the most significant words in a text. In this work, we derive word significance from models trained to solve semantic task: Natural Language Inference and Paraphrase Identification. Using an attribution method aimed to explain the predictions of these…

2023

Breeding Machine Translations: Evolutionary approach to survive and thrive in the world of automated evaluation

ACL 2023long

We propose a genetic algorithm (GA) based method for modifying n-best lists produced by a machine translation (MT) system. Our method offers an innovative approach to improving MT quality and identifying weaknesses in evaluation metrics. Using common GA operations (mutation and crossover) on a list…

2023

HaVQA: A Dataset for Visual Question Answering and Multimodal Research in Hausa Language

ACL 2023findings

This paper presents “HaVQA”, the first multimodal dataset for visual question answering (VQA) tasks in the Hausa language. The dataset was created by manually translating 6,022 English question-answer pairs, which are associated with 1,555 unique images from the Visual Genome dataset. As a result, t…

2023

Robustness of Multi-Source MT to Transcription Errors

ACL 2023findings

Automatic speech translation is sensitive to speech recognition errors, but in a multilingual scenario, the same content may be available in various languages via simultaneous interpreting, dubbing or subtitling. In this paper, we hypothesize that leveraging multiple sources will improve translation…

Cited by 1SourcePDFScholar
2021

Backtranslation Feedback Improves User Confidence in MT, Not Quality

NAACL 2021long

Translating text into a language unknown to the text’s author, dubbed outbound translation, is a modern need for which the user experience has significant room for improvement, beyond the basic machine translation facility. We demonstrate this by showing three ways in which user confidence in the ou…

2021

End-to-End Lexically Constrained Machine Translation for Morphologically Rich Languages

ACL 2021long

Lexically constrained machine translation allows the user to manipulate the output sentence by enforcing the presence or absence of certain words and phrases. Although current approaches can enforce terms to appear in the translation, they often struggle to make the constraint word form agree with t…

Cited by 17SourcePDFScholar
2021

Neural Machine Translation Quality and Post-Editing Performance

EMNLP 2021main

We test the natural expectation that using MT in professional translation saves human processing time. The last such study was carried out by Sanchez-Torron and Koehn (2016) with phrase-based MT, artificially reducing the translation quality. In contrast, we focus on neural MT (NMT) of high quality,…