NAVER LABS Europe Submission to the Instruction-following 2026 Short Track

Marcely Zanon Boito, Hemant Yadav, Jean-Luc Meunier, Ioan Calapodescu


Abstract
In this paper, we describe NAVER LABS Europe’s submission to the instruction-following speech processing short track at IWSLT 2026. We participate again in the constrained setting, developing systems capable of jointly performing ASR, ST, and SQA from English speech into Chinese, Italian, and German. Building on our previous submission, ranked first in last year’s short track, we update our multi-stage training pipeline by replacing the speech projector with SpeechMapper, a method for learning a speech-to-LLM embedding projector using ASR-only data. In addition, we introduce a synthetic SQA dataset, fakACL, composed of artificially generated scientific presentations. This dataset is built by prompting the LLM backbone, segmenting the generated talks, and synthesizing speech with Seamless. The combination of an improved speech projection mechanism and domain-specific synthetic data allows our model to outperform last year’s best short-track system, while being considerably more compact and relying on a weaker LLM backbone.
Anthology ID:
2026.iwslt-1.17
Volume:
Proceedings of the 23rd International Conference on Spoken Language Translation (IWSLT 2026)
Month:
July
Year:
2026
Address:
San Diego, USA (in-person and online)
Editors:
Elizabeth Salesky, Antonios Anastasopoulos, Matteo Negri, Marcello Federico
Venues:
IWSLT | WS
SIG:
SIGSLT
Publisher:
Association for Computational Linguistics
Note:
Pages:
150–163
Language:
URL:
https://aclanthology.org/2026.iwslt-1.17/
DOI:
Bibkey:
Cite (ACL):
Marcely Zanon Boito, Hemant Yadav, Jean-Luc Meunier, and Ioan Calapodescu. 2026. NAVER LABS Europe Submission to the Instruction-following 2026 Short Track. In Proceedings of the 23rd International Conference on Spoken Language Translation (IWSLT 2026), pages 150–163, San Diego, USA (in-person and online). Association for Computational Linguistics.
Cite (Informal):
NAVER LABS Europe Submission to the Instruction-following 2026 Short Track (Zanon Boito et al., IWSLT 2026)
Copy Citation:
PDF:
https://aclanthology.org/2026.iwslt-1.17.pdf