On April 15, 2026, Pope Leo XIV delivered a landmark address at Unity Palace, the official residence of President Paul Biya in Yaoundé, Cameroon, during the second leg of his eleven-day Apostolic journey to Africa. Addressing heads of state, military generals, civil society leaders, and diplomats, the Pope’s speech stood out for its direct engagement with corruption, political authority, human rights, and national unity. Drawing on Augustinian theology, postcolonial ethics, and Catholic social teaching, Leo XIV’s address exemplifies what scholars may term ‘prophetic diplomacy’: pontifical speech that blends pastoral care with candid political critique. This article contends that the Pope strategically applies Critical Discourse Analysis (CDA) using four primary rhetorical strategies and five central thematic clusters to simultaneously urge spiritual reflection, demand postcolonial accountability, and affirm solidarity with Cameroon’s marginalized communities. The article situates these findings within the wider tradition of papal diplomacy in sub-Saharan Africa.