czeski błąd

Literally, “Czech error”. Of unclear origin, although often explained as either of the following:

• From the fact that several Czech words look like their Polish counterparts with two letters transposed; compare for example Polish karp and Czech kapr (“carp”).
• From the fact that Czech numerals can be written in two ways (i.e. twenty-three can be written as dvacet tři or as třiadvacet), making it plausible for someone less familiar with the language to misinterpret the order of the digits.

• IPA^(key): /ˈt͡ʂɛs.ki bwɔnt/

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czeski błąd m inan

1. (printing) A switching of letters in printed text.
   • 2014, Krzysztof Koziołek, Bóg nie weźmie w tym udziału, Manufaktura Tekstów, →ISBN, page 145:

     I jeszcze 21 lipca, może to czeski błąd?

     And also it's the 21 of April, maybe there was a letter flipflop?

   popełnić/zrobić czeski błąd ― to make a letter switch

• czeski błąd in Wielki słownik języka polskiego, Instytut Języka Polskiego PAN
• czeski błąd in Polish dictionaries at PWN