YOU SAID:

penguins are birds that don't have knees

INTO JAPANESE

ペンギンが膝を持っていない鳥です。

BACK INTO ENGLISH

It is a birds penguins have knees.

INTO JAPANESE

鳥はペンギンの膝があります。

BACK INTO ENGLISH

Birds Penguin's knee.

INTO JAPANESE

鳥ペンギンの膝。

BACK INTO ENGLISH

The knee of the birds, penguins.

INTO JAPANESE

鳥、ペンギンの膝。

BACK INTO ENGLISH

The knee of the bird, the Penguin.

INTO JAPANESE

鳥、ペンギンの膝。

BACK INTO ENGLISH

The knee of the bird, the Penguin.