YOU SAID:
I would like a slice of cake, please.
INTO JAPANESE
ケーキをお願いします。
BACK INTO ENGLISH
I'd like a cake.
INTO JAPANESE
ケーキが欲しいです。
BACK INTO ENGLISH
I want a cake.
INTO JAPANESE
ケーキが欲しいです。
BACK INTO ENGLISH
I want a cake.
That didn't even make that much sense in English.