Language curriculum is a theoretical concept and research domain within applied linguistics and education. It encompasses the systematic planning, development, implementation, and evaluation of language learning and teaching programs. This field investigates the selection and sequencing of content, pedagogical approaches, materials design, assessment strategies, and the influence of socio-cultural and institutional contexts on language education. Key characteristics include its systematic nature, grounding in theoretical principles, and focus on achieving defined learning outcomes. Its significance lies in providing a framework for designing effective language education and advancing pedagogical practice.