"We do not like colorful shirts."
Translation:Nie lubimy kolorowych koszul.
I copy paste the given translation : "nie lubimy kolorowych koszulek". I searched on google and in fact, "koszulka" is kind of a synonym of "koszula" with quite different cases (more close to kobieta cases) and gives at the genitive plural "koszulek". But it was far from obvious and the given translation should have been "koszul".