“Analysis of Word-Formation Errors (Affixation, Reduplication, and Compounding) among Foreign Speakers in The ‘Akun Rakidarei’Database as Recommendations for Level 2 Bipa Word Card Materials” (2026) Litteratura: Jurnal Bahasa dan Sastra, 5(1), pp. 93–108. doi:10.15408/ltr.v5i1.52439.