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Personas Differ from Native-Language Generation: Language Pathways Shape LLM Interpersonal Advice

arXiv · AI, language, vision and robotics · article · Aug 31, 2026 · UTC

LLMs are increasingly used for interpersonal advice and as tools for studying social behavior across languages and cultures. A common shortcut for eliciting language- or culture-related variation is to ask a model to answer as a native speaker. We test whether this native-speaker persona reproduces the outputs obtained when models instead generate advice in the target language and translate the response back into English. Using 600 interpersonal advice questions across 13 languages and eight LLMs, we compare native-language generation followed by translation (NL) with native-speaker persona pr

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