YOU SAID:
Why is purple your favorite color
INTO JAPANESE
理由は、お好みの色を紫
BACK INTO ENGLISH
The reason is to purify your favorite color purple
INTO JAPANESE
理由はあなたの好きな色を紫色に浄化するためです
BACK INTO ENGLISH
The reason is to purify your favorite color purple
That didn't even make that much sense in English.