YOU SAID:
Hello, I am pussycat.
INTO JAPANESE
こんにちは、私は猫です。
BACK INTO ENGLISH
Hi, I'm a cat.
INTO JAPANESE
私は猫です。
BACK INTO ENGLISH
I am a cat.
INTO JAPANESE
吾輩は猫である。
BACK INTO ENGLISH
I am a cat.
That didn't even make that much sense in English.