YOU SAID:
The earth is flat and so are penguins
INTO JAPANESE
地球は平らで、ペンギンもそうです
BACK INTO ENGLISH
The earth is flat, so is the penguin
INTO JAPANESE
地球は平らなので、ペンギンもそうです
BACK INTO ENGLISH
The earth is flat, so is the penguin
That didn't even make that much sense in English.