YOU SAID:

Socks are very smelly

INTO JAPANESE

靴下はとても臭い

BACK INTO ENGLISH

Your socks smell so bad.

INTO JAPANESE

あなたの靴下はひどい匂いがします。

BACK INTO ENGLISH

Your socks smell terrible.

INTO JAPANESE

あなたの靴下はひどい臭いがする。

BACK INTO ENGLISH

Your socks smell terrible.