This study continued a project aiming to empirically investigate the plurilingual creativity paradigm, which examines how linguistic and cultural diversity stimulate creative behavior. Particular attention was paid to how plurilingualism and intercultural competence jointly influence the relationship between general motivation and motivation for creativity. The online study included 261 participants representing various linguistic and cultural communities. It utilized scales to assess plurilingualism (number of languages and overall proficiency), intercultural competence (Integrative Intercultural Competence Questionnaire), general motivational characteristics (Renzulli Motivation Scale), and motivation for creativity (Creativity Motivation Scale). To test hypotheses regarding the influence of these factors, regression analysis using a multiple moderation model was conducted. The results revealed a significant three-way interaction: the number of languages and the absence of ethnocentrism jointly moderate the contribution of general motivation to motivation for creativity. It was found that plurilingualism enhances motivation for creativity in individuals with low general motivation but high openness to cultural diversity, demonstrating the stimulating effect of linguistic and cultural flexibility. The obtained data emphasize the importance of intercultural attitudes that help transform linguistic diversity into a source of creative activity. They show that supporting multicultural interaction and foreign language learning can be effective means of developing creative motivation, especially among individuals with moderate or low levels of general motivation. Thus, the results confirm the validity of the plurilingual creativity paradigm and demonstrate that creative activity is formed through the dynamic interaction of motivational, linguistic, and intercultural factors.