YOU SAID:
I am not my long lost twin
INTO JAPANESE
私は長い間失われた双子ではない
BACK INTO ENGLISH
I am not a twin lost for a long time
INTO JAPANESE
私は双子が長い間失われていない
BACK INTO ENGLISH
I have not lost twins for a long time
INTO JAPANESE
私は長い間双子を失っていない
BACK INTO ENGLISH
I have not lost my twins for a long time
INTO JAPANESE
私は長い間双子を失っていない
BACK INTO ENGLISH
I have not lost my twins for a long time
That didn't even make that much sense in English.