This volume offers a comprehensive examination of language policy and planning (LPP) across the Arabic-speaking world, from historical Arabization to contemporary digital revitalization. Using comparative case studies in education, justice, public services, conflict zones, and higher education, it explores key tensions such as diglossia versus dialect equity, English-medium instruction versus mother-tongue rights, and Modern Standard Arabic standardization amid Tamazight resurgence. The chapters examine implementation gaps, institutional capacity, and innovative tools such as register-aware NLP, while also addressing minority languages, conflict-sensitive governance, and globalization’s linguistic hierarchies. Bridging theory and practice, the book presents evidence-based mechanisms including annual reviews, theory-of-change monitoring, and capacity-before-scale to achieve equitable outcomes and linguistic justice. Essential for scholars of sociolinguistics, linguistic anthropology, Middle Eastern studies, and policy practitioners, it fosters inclusive dialogue to preserve the region’s rich multilingual heritage.