Jannis Vamvas

According to our database, Jannis Vamvas authored at least 30 papers between 2020 and 2026.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2026

RUMLEM: A Dictionary-Based Lemmatizer for Romansh.

Dominic P. Fischer, Zachary William Hopton, Jannis Vamvas

CoRR, April, 2026

Translation Asymmetry in LLMs as a Data Augmentation Factor: A Case Study for 6 Romansh Language Varieties.

Jannis Vamvas, Ignacio Pérez Prat, Angela Heldstab, Dominic P. Fischer, Sina Ahmadi, Rico Sennrich

CoRR, March, 2026

Robust Language Identification for Romansh Varieties.

Charlotte Model, Sina Ahmadi, Jannis Vamvas

CoRR, March, 2026

DeReason: A Difficulty-Aware Curriculum Improves Decoupled SFT-then-RL Training for General Reasoning.

Hanxu Hu, Yuxuan Wang, Maggie Huan, Jannis Vamvas, Yinya Huang, Zhijiang Guo, Rico Sennrich

CoRR, March, 2026

The Mediomatix Corpus: Parallel Data for Romansh Language Varieties via Comparable Schoolbooks.

Zachary William Hopton, Jannis Vamvas, Andrin Büchler, Anna Rutkiewicz, Rico Cathomas, Rico Sennrich

Proceedings of the Findings of the Association for Computational Linguistics: EACL 2026, 2026

2025

SwissGov-RSD: A Human-annotated, Cross-lingual Benchmark for Token-level Recognition of Semantic Differences Between Related Documents.

Michelle Wastl, Jannis Vamvas, Rico Sennrich

CoRR, December, 2025

QueST: Incentivizing LLMs to Generate Difficult Problems.

Hanxu Hu, Xingxing Zhang, Jannis Vamvas, Rico Sennrich, Furu Wei

CoRR, October, 2025

The Mediomatix Corpus: Parallel Data for Romansh Idioms via Comparable Schoolbooks.

Zachary William Hopton, Jannis Vamvas, Andrin Büchler, Anna Rutkiewicz, Rico Cathomas, Rico Sennrich

CoRR, August, 2025

20min-XD: A Comparable Corpus of Swiss News Articles.

Michelle Wastl, Jannis Vamvas, Selena Calleri, Rico Sennrich

CoRR, April, 2025

Expanding the WMT24++ Benchmark with Rumantsch Grischun, Sursilvan, Sutsilvan, Surmiran, Puter, and Vallader.

Jannis Vamvas, Ignacio Pérez Prat, Not Battesta Soliva, Sandra Baltermia-Guetg, Andrina Beeli, Simona Beeli, Madlaina Capeder, Laura Decurtins, Gian Peder Gregori, Flavia Hobi, Gabriela Holderegger, Arina Lazzarini, Viviana Lazzarini, Walter Rosselli, Bettina Vital, Anna Rutkiewicz, Rico Sennrich

Proceedings of the Tenth Conference on Machine Translation, 2025

UZH at SemEval-2025 Task 3: Token-Level Self-Consistency for Hallucination Detection.

Michelle Wastl, Jannis Vamvas, Rico Sennrich

Proceedings of the 19th International Workshop on Semantic Evaluation, 2025

Source-primed Multi-turn Conversation Helps Large Language Models Translate Documents.

Hanxu Hu, Jannis Vamvas, Rico Sennrich

Proceedings of the Findings of the Association for Computational Linguistics: EMNLP 2025, 2025

Machine Translation Models are Zero-Shot Detectors of Translation Direction.

Michelle Wastl, Jannis Vamvas, Rico Sennrich

Proceedings of the Findings of the Association for Computational Linguistics, 2025

Leveraging In-Context Learning for Political Bias Testing of LLMs.

Patrick Haller, Jannis Vamvas, Rico Sennrich, Lena Ann Jäger

Proceedings of the 63rd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers), 2025

2024

Fine-tuning the SwissBERT Encoder Model for Embedding Sentences and Documents.

Juri Grosjean, Jannis Vamvas

CoRR, 2024

Linear-time Minimum Bayes Risk Decoding with Reference Aggregation.

Jannis Vamvas, Rico Sennrich

CoRR, 2024

Modular Adaptation of Multilingual Encoders to Written Swiss German Dialect.

Jannis Vamvas, Noëmi Aepli, Rico Sennrich

CoRR, 2024

Thesis: Model-based Evaluation of Multilinguality.

Jannis Vamvas

Proceedings of the 25th Annual Conference of the European Association for Machine Translation (Volume 1), 2024

Mitigating Hallucinations and Off-target Machine Translation with Source-Contrastive and Language-Contrastive Decoding.

Rico Sennrich, Jannis Vamvas, Alireza Mohammadshahi

Proceedings of the 18th Conference of the European Chapter of the Association for Computational Linguistics, 2024

2023

Investigating Multi-Pivot Ensembling with Massively Multilingual Machine Translation Models.

Alireza Mohammadshahi, Jannis Vamvas, Rico Sennrich

CoRR, 2023

Towards Unsupervised Recognition of Semantic Differences in Related Documents.

Jannis Vamvas, Rico Sennrich

CoRR, 2023

SwissBERT: The Multilingual Language Model for Switzerland.

Jannis Vamvas, Johannes Graën, Rico Sennrich

CoRR, 2023

Trained MT Metrics Learn to Cope with Machine-translated References.

Jannis Vamvas, Tobias Domhan, Sony Trenous, Rico Sennrich, Eva Hasler

Proceedings of the Eighth Conference on Machine Translation, 2023

Towards Unsupervised Recognition of Token-level Semantic Differences in Related Documents.

Jannis Vamvas, Rico Sennrich

Proceedings of the 2023 Conference on Empirical Methods in Natural Language Processing, 2023

2022

NMTScore: A Multilingual Analysis of Translation-based Text Similarity Measures.

Jannis Vamvas, Rico Sennrich

Proceedings of the Findings of the Association for Computational Linguistics: EMNLP 2022, 2022

As Little as Possible, as Much as Necessary: Detecting Over- and Undertranslations with Contrastive Conditioning.

Jannis Vamvas, Rico Sennrich

Proceedings of the 60th Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers), 2022

2021

Contrastive Conditioning for Assessing Disambiguation in MT: A Case Study of Distilled Bias.

Jannis Vamvas, Rico Sennrich

Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing, 2021

On the Limits of Minimal Pairs in Contrastive Evaluation.

Jannis Vamvas, Rico Sennrich

Proceedings of the Fourth BlackboxNLP Workshop on Analyzing and Interpreting Neural Networks for NLP, 2021

Proceedings of the ACL-IJCNLP 2021 Student Research Workshop.

Jad Kabbara, Haitao Lin, Amandalynne Paullada, Jannis Vamvas

Proceedings of the ACL-IJCNLP 2021 Student Research Workshop, 2021

2020

X -stance: A Multilingual Multi-Target Dataset for Stance Detection.

Jannis Vamvas, Rico Sennrich

Proceedings of the 5th Swiss Text Analytics Conference and the 16th Conference on Natural Language Processing, 2020