Abstract
The concept of a comprehensive language curriculum provides an important basis for the development of student's plurilingual competence. It ensures the inclusion of all students' language skills in language education, the creation of cross-linguistic connections, and the development of language awareness and awareness of language learning. Factors that influence the implementation of this concept at the school level are, amongst others: school leadership, collaboration among school staff, appropriate teaching methods, and beliefs and attitudes of all members of the school as an educational community. To determine possibilities for the implementation of comprehensive language curricula in Croatian primary schools, qualitative methods were used to investigate beliefs of language teachers, professional associates, and school principals about the development of students' plurilingual competence, as well as language teachers' teaching practice and the ways plurilingual education is supported at school level. Data analysis shows that the participants mostly have monolingual beliefs when it comes to the development of students' plurilingual competence. Also, although most teachers state that they make comparisons between languages in their teaching, a systematic cross-linguistic comparison and cooperation in the planning and implementation of language education are almost completely absent.