Exploring the Impact of Language Switching on Personality Traits in LLMs

Jacopo Amidei, Jose Gregorio Ferreira De Sá, Rubén Nieto Luna, Andreas Kaltenbrunner

Abstract: This paper investigates the extent to which LLMs align with humans when personality shifts are associated with language changes. Based on three experiments, that focus on GPT-4o and the Eysenck Personality Questionnaire-Revised (EPQR-A), our initial results reveal a weak yet significant variation in GPT-4o’s personality across languages, indicating that some stem from a language-switching effect rather than translation. Further analysis across five English-speaking countries shows that GPT-4o, leveraging stereotypes, reflects distinct country-specific personality traits.