YOU SAID:
The cat has a hat, which is striped and yellow
INTO JAPANESE
猫は縞模様と黄色の帽子をかぶっている
BACK INTO ENGLISH
The cat wears a striped pattern and a yellow hat
INTO JAPANESE
猫は縞模様と黄色い帽子をかぶっています
BACK INTO ENGLISH
The cat wears stripes and a yellow hat
INTO JAPANESE
猫はストライプと黄色い帽子をかぶっています
BACK INTO ENGLISH
The cat wears stripes and a yellow hat
That didn't even make that much sense in English.