RLHF Can Speak Many Languages: Unlocking Multilingual Preference Optimization for LLMs

• URL: http://arxiv.org/abs/2407.02552v1
• Date: Tue, 2 Jul 2024 17:42:30 GMT
• Title: RLHF Can Speak Many Languages: Unlocking Multilingual Preference Optimization for LLMs
• Authors: John Dang, Arash Ahmadian, Kelly Marchisio, Julia Kreutzer, Ahmet Üstün, Sara Hooker,
• Abstract summary: We introduce a novel, scalable method for generating high-quality multilingual feedback data. Our preference-trained model achieves a 54.4% win-rate against Aya 23 8B. As a result of our study, we expand the frontier of alignment techniques to 23 languages covering half of the world's population.
• Score: 13.563021984882704
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Preference optimization techniques have become a standard final stage for training state-of-art large language models (LLMs). However, despite widespread adoption, the vast majority of work to-date has focused on first-class citizen languages like English and Chinese. This captures a small fraction of the languages in the world, but also makes it unclear which aspects of current state-of-the-art research transfer to a multilingual setting. In this work, we perform an exhaustive study to achieve a new state-of-the-art in aligning multilingual LLMs. We introduce a novel, scalable method for generating high-quality multilingual feedback data to balance data coverage. We establish the benefits of cross-lingual transfer and increased dataset size in preference training. Our preference-trained model achieves a 54.4% win-rate against Aya 23 8B, the current state-of-the-art multilingual LLM in its parameter class, and a 69.5% win-rate or higher against widely used models like Gemma-1.1-7B-it, Llama-3-8B-Instruct, Mistral-7B-Instruct-v0.3. As a result of our study, we expand the frontier of alignment techniques to 23 languages covering half of the world's population.

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