YOU SAID:
This is what you're talking about.
INTO JAPANESE
これは、あなたが何について話しているです。
BACK INTO ENGLISH
Talking about what you are.
INTO JAPANESE
あなたが何かについて話しています。
BACK INTO ENGLISH
Are you talking about something.
INTO JAPANESE
あなたは何かについて話しています。
BACK INTO ENGLISH
Are you talking about something.
That didn't even make that much sense in English.