Character traits change upon language switch in Croatian speakers of English

In this paper we tackle the feeling of a personality change users of more than one language reportedly experience when switching between their languages. We set to investigate if Croatian learners of English as a foreign language (EFL) experience a character trait change when switching between Croatian and English; which of the Big Five Inventory (BFI) personality dimensions change the most and which the least in Croatians using English, as well as whether there is a difference in this character trait change between different EFL proficiency groups. A total of 94 Croatian EFL speakers participated in the study. The sample was divided into a more proficient EFL speaker group (C1 level) and a less proficient EFL speaker group (B2 level). Each participant completed an EFL proficiency test and two sets of BFI questionnaires. One BFI set focused on the character traits the participants reported having while using Croatian; the second BFI set focused on the traits they reported having while using English. The results show that the participants experience a personality change when switching between their two languages and that different levels of language proficiency affect certain personality dimensions in EFL learners. In conclusion, we propose that the more proficient speakers may be bicultural and are experiencing cultural frame switching.