YOU SAID:
It's my mistake I make it
INTO JAPANESE
私は、私のミスです。
BACK INTO ENGLISH
I is my mistake.
INTO JAPANESE
私は私のミスです。
BACK INTO ENGLISH
This is my mistake.
INTO JAPANESE
これは私のミスです。
BACK INTO ENGLISH
This is my mistake.
That didn't even make that much sense in English.