sPhinX: Sample Efficient Multilingual Instruction Fine-Tuning Through N-shot Guided Prompting

Sanchit Ahuja, Kumar Tanmay, Hardik Hansrajbhai Chauhan, Barun Patra, Kriti Aggarwal, Luciano Del Corro, Arindam Mitra, Tejas Indulal Dhamecha, Ahmed Hassan Awadallah, Monojit Choudhury, Vishrav Chaudhary, Sunayana Sitaram


Abstract
Despite the remarkable success of large language models (LLMs) in English, a significant performance gap remains in non-English languages. To address this, we introduce a novel approach for strategically constructing a multilingual synthetic instruction tuning dataset, sPhinX. Unlike prior methods that directly translate fixed instruction-response pairs, sPhinX enhances diversity by selectively augmenting English instruction-response pairs with multilingual translations. Additionally, we propose LANGIT, a novel N-shot guided fine-tuning strategy, which further enhances model performance by incorporating contextually relevant examples in each training sample. Our ablation study shows that our approach enhances the multilingual capabilities of Mistral-7B and Phi-3-Small improving performance by an average of 39.8% and 11.2%, respectively, across multilingual benchmarks in reasoning, question answering, reading comprehension, and machine translation. Moreover, sPhinX maintains strong performance on English LLM benchmarks while exhibiting minimal to no catastrophic forgetting, even when trained on 51 languages.
Anthology ID:
2025.gem-1.73
Volume:
Proceedings of the Fourth Workshop on Generation, Evaluation and Metrics (GEM²)
Month:
July
Year:
2025
Address:
Vienna, Austria and virtual meeting
Editors:
Kaustubh Dhole, Miruna Clinciu
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GEM | WS
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Publisher:
Association for Computational Linguistics
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Pages:
927–946
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URL:
https://preview.aclanthology.org/corrections-2025-08/2025.gem-1.73/
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Cite (ACL):
Sanchit Ahuja, Kumar Tanmay, Hardik Hansrajbhai Chauhan, Barun Patra, Kriti Aggarwal, Luciano Del Corro, Arindam Mitra, Tejas Indulal Dhamecha, Ahmed Hassan Awadallah, Monojit Choudhury, Vishrav Chaudhary, and Sunayana Sitaram. 2025. sPhinX: Sample Efficient Multilingual Instruction Fine-Tuning Through N-shot Guided Prompting. In Proceedings of the Fourth Workshop on Generation, Evaluation and Metrics (GEM²), pages 927–946, Vienna, Austria and virtual meeting. Association for Computational Linguistics.
Cite (Informal):
sPhinX: Sample Efficient Multilingual Instruction Fine-Tuning Through N-shot Guided Prompting (Ahuja et al., GEM 2025)
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https://preview.aclanthology.org/corrections-2025-08/2025.gem-1.73.pdf