Nuno Miguel Serrano Guerreiro

Nuno Guerreiro

Former IT academic position:	External Author
Joining/Leaving IT dates:	01-09-2020 / 01-12-2025
Roles held in IT:	PhD Student
Former IT thematic line:	Information and Data Sciences
Group:	Pattern and Image Analysis – Lx

Scientific Achievements

Publications

23Papers in Conferences

J. Pombal, R. Rei, N. Guerreiro, A. Martins, Adding Chocolate to Mint: Mitigating Metric Interference in Machine Translation, Empirical Methods in Language Processing - EMNLP, Suzhou, China, November, 2025,
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A. F. Farinhas, S. A. Agrawal, N. Guerreiro, A. Martins, Translate Smart, not Hard: Cascaded Translation Systems with Quality-Aware Deferral, Empirical Methods in Language Processing - EMNLP, Suzhou, China, Vol., pp. -, November, 2025 | BibTex
J. Pombal, N. Guerreiro, R. Rei, A. Martins, Zero-shot Benchmarking: A Framework for Flexible and Scalable Automatic Evaluation of Language Models, Conference on Language Modeling COLM, Conference online, October, 2025,
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N. Boizard, H. Gisserot-Boukhlef, D. A. Alves, A. Martins, A. Hammal, C. Corro, C. Hudelot, E. Malherbe, E. Malaboeuf, F. Jourdan, G. Hautreux, J. Alves, K. El-Haddad, M. Faysse, M. Peyrard, N. Guerreiro, P. Fernandes, R. Rei, P. Colombo, EuroBERT: Scaling Multilingual Encoders for European Languages, Conference on Language Modeling COLM, Montreal, Canada, October, 2025,
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A. Himmi, G. Staerman, M. Picot, P. Colombo, N. Guerreiro, Enhanced Hallucination Detection in Neural Machine Translation through Simple Detector Aggregation, Empirical Methods in Language Processing - EMNLP, Miami, United States, Vol., pp. -, November, 2024,
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J. Pombal, R. Rei, N. Guerreiro, J. Alves, P. H. Martins, P. Fernandes, HW Wu, T. Vaz, D. A. Alves, M. Farajian, S. A. Agrawal, A. F. Farinhas, J. G. de Souza, A. Martins, TOWER-V2: Unbabel-IST 2024 Submission for the General MT Shared Task, Empirical Methods in Language Processing - EMNLP, Miami, United States, November, 2024,
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E. Zaranis, N. Guerreiro, A. Martins, Analyzing Context Contributions in LLM-based Machine Translation, Empirical Methods in Language Processing - EMNLP, Miami, United States, November, 2024 | BibTex
S. A. Agrawal, J. G. de Souza, R. Rei, A. F. Farinhas, G. Faria, P. Fernandes, N. Guerreiro, A. Martins, Modeling User Preferences with Automatic Metrics: Creating a High-Quality Preference Dataset for Machine Translation, Empirical Methods in Language Processing - EMNLP, Miami, United States, November, 2024 | BibTex
M. V. T. Treviso, N. Guerreiro, S. A. Agrawal, R. Rei, J. Pombal, T. Vaz, HW Wu, B. Silva, D. Stigt, A. Martins, xTower: A Multilingual LLM for Explaining and Correcting Translation Errors, Empirical Methods in Language Processing - EMNLP, Miami, United States, November, 2024,
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C Zerva, F. Blain, J. G. Sousa, D. Kanojia, S. Deoghar, N. Guerreiro, G. A. Attanasio, R. Rei, C. Orasan, M. Negri, M. Turchi, R. Chatterjee, P. Bhattacharyya, M. Freitag, A. Martins, Findings of the Quality Estimation Shared Task at WMT 2024 Are LLMs Closing the Gap in QE?, Conference on Machine Translation WMT, Miami, United States, Vol., pp. -, November, 2024,
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N. Guerreiro, D. A. Alves, J. Pombal, P. H. Martins, J. Alves, M. Farajian, B. Peters, R. Rei, P. Fernandes, S. A. Agrawal, P. Colombo, J. G. de Souza, A. Martins, Tower: An Open Multilingual Large Language Model for Translation-Related Tasks, Conference on Language Modeling COLM, Philadelphia, United States, Vol., pp. -, October, 2024,
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P. Martins, N. Guerreiro, P. Fernandes, J. Alves, R. Rei, D. A. Alves, J. Pombal, M. Farajian, M. Faysse, P. Colombo, B. Haddow, J. G. de Souza, A. Birch, A. Martins, EuroLLM: Multilingual Language Models for Europe, EuroHPC User Day, Amsterdam, Netherlands, Vol., pp. -, October, 2024,
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N. Guerreiro, R. Rei, D. Stigt, L. C. Coheur, P. Colombo, A. Martins, xCOMET: Transparent Machine Translation Evaluation through Fine-grained Error Detection, Empirical Methods in Language Processing - EMNLP, Bangkok, Thailand, Vol., pp. -, August, 2024,
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N. Guerreiro, D. A. Alves, J. Waldendorf, J. Waldendorf, B. Haddow, A. Birch, P. Colombo, A. Martins, Hallucinations in Large Multilingual Translation Models, Empirical Methods in Language Processing - EMNLP, Singapore, Singapore, Vol., pp. -, December, 2023,
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F. Blain, C Zerva, R. Rei, N. Guerreiro, D. Kanojia, J. G. Sousa, B. Silva, T. Vaz, Y. Jinxuan, F. Azadi, C. Orasan, A. Martins, Findings of the WMT 2023 Shared Task on Quality Estimation, Conference on Machine Translation WMT, Singapore, Singapore, Vol., pp. -, December, 2023,
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R. Rei, N. Guerreiro, J. Pombal, D. Stigt, M. V. T. Treviso, L. C. Coheur, J. G. de Souza, A. Martins, Scaling up CometKiwi: Unbabel-IST 2023 Submission for the Quality Estimation Shared Task, Conference on Machine Translation WMT, Singapore, Singapore, December, 2023 | BibTex
N. Guerreiro, P. Colombo, P. Piantanida, A. Martins, Optimal Transport for Unsupervised Hallucination Detection in Neural Machine Translation, Annual Meeting of the Association for Computational Linguistics - ACL, Toronto, Canada, Vol., pp. -, July, 2023,
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M. V. T. Treviso, A. R. Ross, N. Guerreiro, A. Martins, CREST: A Joint Framework for Rationalization and Counterfactual Text Generation, Annual Meeting of the Association for Computational Linguistics - ACL, Toronto, Canada, Vol., pp. -, July, 2023 | BibTex
M. V. T. Treviso, R. Rei, N. Guerreiro, L. C. Coheur, A. Lavie, A. Martins, The Inside Story: Towards Better Understanding of Machine Translation Neural Evaluation Metrics, Annual Meeting of the Association for Computational Linguistics - ACL, Toronto, Canada, July, 2023 | BibTex
N. Guerreiro, E. Voita, A. Martins, Looking for a Needle in a Haystack: A Comprehensive Study of Hallucinations in Neural Machine Translation, EACL: Conference of the European Chapter of the Association for Computational Linguistics EACL, Dubrovnik, Croatia, Vol., pp. -, May, 2023,
| Abstract | Full text (PDF 1 MB) | BibTex
R. Rei, M. V. T. Treviso, C Zerva, N. Guerreiro, A. C. Farinha, C. M. Maroti, J.M. Sousa, T. Glushkova, D. M. A. Alves, A. Lavie, L. C. Coheur, A. Martins, CometKiwi: IST-Unbabel 2022 Submission for the Quality Estimation Shared Task, Conference on Machine Translation WMT, Abu Dhabi, United Arab Emirates, Vol., pp. -, December, 2022,
| Abstract | BibTex
N. Guerreiro, A. Martins, SPECTRA: Sparse Structured Text Rationalization, Empirical Methods in Language Processing - EMNLP, Punta Cana, Dominican Republic, November, 2021,
| Abstract | Full text (PDF 1017 KBs) | BibTex
M. V. T. Treviso, N. Guerreiro, R. Rei, A. Martins, IST-Unbabel 2021 Submission for the Explainable Quality Estimation Shared Task, Empirical Methods in Language Processing - EMNLP, Punta Cana, Dominican Republic, November, 2021 | BibTex

Projects

Currently running projects1

Acronym	Name	Funding Agency	Start date	Ending date
DECOLLAGE	DECOLLAGE - DEep COgnition Learning for LAnguage GEneration	EU/Horizon Europe	01-08-2023	31-07-2028

Closed Projects3

Acronym	Name	Funding Agency	Start date	Ending date
MAIA	Multilingual Virtual Agents for Customer Service	P2020	01-07-2020	01-07-2023
NextGenAI	NextGenAI - Center for Responsible AI	IAPMEI	01-10-2021	31-12-2025
UTTER	Unified Transcription and Translation for Extended Reality	EU	01-10-2022	30-09-2025

IT Former Collaborator

Nuno Guerreiro

Scientific Achievements

Currently running projects1

Closed Projects3