YOU SAID:
I have a potato and a green guy.
INTO JAPANESE
私はじゃがいもと緑色の人がいます。
BACK INTO ENGLISH
I have a potato and a green person.
INTO JAPANESE
私はじゃがいもと緑の人がいます。
BACK INTO ENGLISH
I have potatoes and green people.
INTO JAPANESE
私はじゃがいもと緑の人がいます。
BACK INTO ENGLISH
I have potatoes and green people.
That didn't even make that much sense in English.