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Which languages appeared side by side in John Amos Comenius’s Janua Linguarum Reserata?

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In his influential textbook Janua Linguarum Reserata, John Amos Comenius presented text in Latin and Czech side by side.1

This pedagogical approach allowed students to compare the two languages directly, helping them associate specific words with the objects or concepts they described, rather than relying on traditional, inefficient methods of rote grammar memorization.1