YOU SAID:
I genuinely don't understand the purpose of this website
INTO JAPANESE
私はこのウェブサイトの目的を本当に理解していません
BACK INTO ENGLISH
I don't really understand the purpose of this website
INTO JAPANESE
このウェブサイトの目的がよくわかりません
BACK INTO ENGLISH
I'm not sure what the purpose of this website is
INTO JAPANESE
このウェブサイトの目的が何であるか分かりません
BACK INTO ENGLISH
I don't know what the purpose of this website is
INTO JAPANESE
このウェブサイトの目的がわかりません
BACK INTO ENGLISH
I don't understand the purpose of this website
INTO JAPANESE
このウェブサイトの目的がわかりません
BACK INTO ENGLISH
I don't understand the purpose of this website
You've done this before, haven't you.