Beyond Training for Cultural Awareness: The Role of Dataset Linguistic Structure in Large Language Models

• URL: http://arxiv.org/abs/2602.01161v1
• Date: Sun, 01 Feb 2026 11:21:30 GMT
• Title: Beyond Training for Cultural Awareness: The Role of Dataset Linguistic Structure in Large Language Models
• Abstract summary: We look at the linguistic properties of fine-tuning datasets used for cultural adaptation.<n>We compute lightweight linguistic, semantic, and structural metrics for Arabic, Chinese, and Japanese datasets.<n>We show that lexical-oriented components (PC3) are the most robust, yielding more consistent performance across models and benchmarks.
• Score: 11.682773682018977
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The global deployment of large language models (LLMs) has raised concerns about cultural misalignment, yet the linguistic properties of fine-tuning datasets used for cultural adaptation remain poorly understood. We adopt a dataset-centric view of cultural alignment and ask which linguistic properties of fine-tuning data are associated with cultural performance, whether these properties are predictive prior to training, and how these effects vary across models. We compute lightweight linguistic, semantic, and structural metrics for Arabic, Chinese, and Japanese datasets and apply principal component analysis separately within each language. This design ensures that the resulting components capture variation among datasets written in the same language rather than differences between languages. The resulting components correspond to broadly interpretable axes related to semantic coherence, surface-level lexical and syntactic diversity, and lexical or structural richness, though their composition varies across languages. We fine-tune three major LLM families (LLaMA, Mistral, DeepSeek) and evaluate them on benchmarks of cultural knowledge, values, and norms. While PCA components correlate with downstream performance, these associations are strongly model-dependent. Through controlled subset interventions, we show that lexical-oriented components (PC3) are the most robust, yielding more consistent performance across models and benchmarks, whereas emphasizing semantic or diversity extremes (PC1-PC2) is often neutral or harmful.

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