Interferensi Bahasa Daerah (Banjar) dalam Maharah Kalam Santriwati: Studi Kasus di Pondok Pesantren Darul Hijrah, Martapura, Kalimantan Selatan

This research aims to find out how the forms of interference of the Banjar regional language in the maharah kalam of the students of the Darul Hijrah Puteri Islamic Boarding School in 2026.
The research uses a qualitative approach with the research subject, namely students at the Darul Hijrah Puteri Islamic Boarding School as Arabic language learners and the environment where language is required. The choice of the Daril Hijrah Puteri Islamic Boarding School as the location of the research is due to the importance of the language environment in shaping the ability of maharah kalam santriwati, especially in the context of the mandatory implementation of using Arabic in the pesantren environment. The data collection method is carried out through observation, interviews and documentation, while data analysis uses qualitative technique data with the type of case study.
The results of the study explained that the interference of the Banjar regional language dala maharah kalam santriwati appeared in several forms, namely phonology, morphology and syntactic interference which had an impact on fluency, pronunciation accuracy and the impact of Arabic communication of santriwati.