YOU SAID:
The frog is purple the cupcake has green fish
INTO JAPANESE
カエルは紫色、カップケーキには緑色の魚が入っています
BACK INTO ENGLISH
The frog is purple and the cupcake contains a green fish.
INTO JAPANESE
カエルは紫色で、カップケーキには緑色の魚が入っています。
BACK INTO ENGLISH
The frog is purple and the cupcake contains a green fish.
That didn't even make that much sense in English.