CUNI-NL@IWSLT 2025: End-to-end Offline Speech Translation and Instruction Following with LLMs

This paper describes the CUNI-NL team's submission to the IWSLT 2025 Offline Speech Translation and Instruction Following tasks, focusing on transcribing the English audio and translating the English audio to German text.Our systems follow the end-to-end approach, where each system consists of a pretrained, frozen speech encoder, along with a mediumsized large language model fine-tuned with LoRA on three tasks: 1) transcribing the English audio; 2) directly translating the English audio to German text; and 3) a combination of the above two tasks, i.e., simultaneously transcribing the English audio and translating the English audio to German text.