YOU SAID:
this gibberish sentence will become the most gibberish thing you will ever hear, okay?
INTO JAPANESE
このばかげた文は、あなたが今までに聞いたことのない最もばかげたことになるでしょう、大丈夫?
BACK INTO ENGLISH
This silly sentence will be the most foolish thing you have never heard before, is it okay?
INTO JAPANESE
このばかげた文章はあなたが今までに聞いたことがない最も愚かなことになるでしょう、大丈夫ですか?
BACK INTO ENGLISH
This silly sentence will be the most stupid thing you have never heard before, is it okay?
INTO JAPANESE
このばかげた文章は、あなたが今までに聞いたことがない最も愚かなことになるでしょう、大丈夫ですか?
BACK INTO ENGLISH
This silly sentence will be the most stupid thing you have never heard before, is it okay?
You've done this before, haven't you.