Retrieval-Augmented Machine Translation with Unstructured Knowledge

• URL: http://arxiv.org/abs/2412.04342v1
• Date: Thu, 05 Dec 2024 17:00:32 GMT
• Title: Retrieval-Augmented Machine Translation with Unstructured Knowledge
• Authors: Jiaan Wang, Fandong Meng, Yingxue Zhang, Jie Zhou,
• Abstract summary: Retrieval-augmented generation (RAG) introduces additional information to enhance large language models (LLMs) In machine translation (MT), previous work typically retrieves in-context examples from paired MT corpora, or domain-specific knowledge from knowledge graphs. In this paper, we study retrieval-augmented MT using unstructured documents.
• Score: 74.84236945680503
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• Abstract: Retrieval-augmented generation (RAG) introduces additional information to enhance large language models (LLMs). In machine translation (MT), previous work typically retrieves in-context examples from paired MT corpora, or domain-specific knowledge from knowledge graphs, to enhance models' MT ability. However, a large amount of world knowledge is organized in unstructured documents, and might not be fully paired across different languages. In this paper, we study retrieval-augmented MT using unstructured documents. Specifically, we build RAGtrans, the first benchmark to train and evaluate LLMs' retrieval-augmented MT ability. RAGtrans contains 79K MT samples collected via GPT-4o and human translators. Besides, documents from different languages are also provided to supply the knowledge to these samples. Based on RAGtrans, we further propose a multi-task training method to teach LLMs how to use information from multilingual documents during their translation. The method uses existing multilingual corpora to create auxiliary training objectives without additional labeling requirements. Extensive experiments show that the method improves LLMs by 1.58-3.09 BLEU and 1.00-2.03 COMET scores.

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