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Felix Hieber

3 accepted papers

2025

XRAG: Cross-lingual Retrieval-Augmented Generation

EMNLP 2025

We propose XRAG, a novel benchmark designed to evaluate the generation abilities of LLMs in cross-lingual Retrieval-Augmented Generation (RAG) settings where the user language does not match the retrieval results. XRAG is constructed from recent news articles to ensure that its questions require ext

2022

The Devil is in the Details: On the Pitfalls of Vocabulary Selection in Neural Machine Translation

NAACL 2022long

Vocabulary selection, or lexical shortlisting, is a well-known technique to improve latency of Neural Machine Translation models by constraining the set of allowed output words during inference. The chosen set is typically determined by separately trained alignment model parameters, independent of t…

2021

Improving the Quality Trade-Off for Neural Machine Translation Multi-Domain Adaptation

EMNLP 2021main

Building neural machine translation systems to perform well on a specific target domain is a well-studied problem. Optimizing system performance for multiple, diverse target domains however remains a challenge. We study this problem in an adaptation setting where the goal is to preserve the existing…

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