YOU SAID:
Going to bring his year 6 cousin
INTO JAPANESE
彼の6年目のいとこを連れてくるつもり
BACK INTO ENGLISH
I'm going to bring his 6th year cousin
INTO JAPANESE
私は彼の6年目のいとこを連れてくるつもりです
BACK INTO ENGLISH
I'm going to bring his 6th year cousin
That didn't even make that much sense in English.