arXiv · 2404.04850
How Many Languages Make Good Multilingual Instruction Tuning? A Case Study on BLOOM
Abstract
Instruction tuning a large language model with multiple languages can prepare it for multilingual downstream tasks. Nonetheless, it is yet to be determined whether having a handful of languages is sufficient, or whether the benefits increase with the inclusion of more. By fine-tuning large multilingual models on 1 to 52 languages, we present a case study on BLOOM to understand three pertinent factors affecting performance: the number of languages, language exposure, and similarity between training and test languages. Overall we found that 1) expanding language coverage in multilingual instruction tuning proves to be beneficial; 2) accuracy often significantly boots if the test language appears in the instruction mixture; 3) languages' genetic features correlate with cross-lingual transfer more than merely the number of language but different languages benefit to various degrees.
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Shaoxiong Ji, Pinzhen Chen. 2024-04-07. How Many Languages Make Good Multilingual Instruction Tuning? A Case Study on BLOOM. https://arxiv.org/abs/2404.04850
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