YOU SAID:

my toes are cold and so are hers

INTO JAPANESE

私のつま先は冷たく、彼女もそうです

BACK INTO ENGLISH

My toes are cold, so is her

INTO JAPANESE

私のつま先は冷たいので、彼女も冷たいです

BACK INTO ENGLISH

My toes are cold, so she's also cold

INTO JAPANESE

つま先が寒いので彼女も寒い

BACK INTO ENGLISH

She's cold because her toes are cold

INTO JAPANESE

つま先が冷たいので寒い

BACK INTO ENGLISH

It's cold because my toes are cold

INTO JAPANESE

つま先が冷たいので寒いです

BACK INTO ENGLISH

It's cold because my toes are cold