YOU SAID:

there is a cat on my window

INTO JAPANESE

私の窓に猫がいる

BACK INTO ENGLISH

I have a cat in my window

INTO JAPANESE

窓の中に猫がいる

BACK INTO ENGLISH

There is a cat in the window

INTO JAPANESE

窓の中に猫がいる

BACK INTO ENGLISH

There is a cat in the window