YOU SAID:
I don’t understand this website
INTO JAPANESE
このウェブサイトがわかりません
BACK INTO ENGLISH
I don't know this website
INTO JAPANESE
このウェブサイトを知りません
BACK INTO ENGLISH
I do not know this website
INTO JAPANESE
このウェブサイトを知りません
BACK INTO ENGLISH
I do not know this website
That didn't even make that much sense in English.