YOU SAID:

my brother, nathaniel is a stinky poo

INTO JAPANESE

私の弟、ナサニエルはうんちが臭いです

BACK INTO ENGLISH

My brother Nathaniel's poop stinks.

INTO JAPANESE

兄のナサニエルのうんこは臭いです。

BACK INTO ENGLISH

My brother Nathaniel's poop stinks.