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Since when did Korea become majority Christian? As for your other points, I understand them. However, I'd still say that Hindi and Urdu seem to have more prestige in India and Pakistan respectively (to say nothing of Bengali in Bangladesh) than the likes of Swahili and Yoruba do in their native countries. I'd also still say that, countries like Indonesia and Philippines notwithstanding, the encroachment of both Christianity and Islam in East Asia was less severe than in most of Africa.
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