An unexpected push to introduce Portuguese as a priority subject in Indonesia’s classrooms has set tongues wagging about President Prabowo Subianto’s educational priorities. The plan, which Prabowo unveiled during Brazilian President Luiz Inacio Lula da Silva’s visit to Jakarta last month, left educators, lawmakers and community leaders grappling with the realities of what such an ambition might mean. “As a sign of how important Brazil is to us, I have decided that Portuguese will become one of...