YOU SAID:
A dog is man's best friend because they are lovely.
INTO JAPANESE
彼らが素敵なので、犬は人間の最良の友です。
BACK INTO ENGLISH
They are so nice, dog is man's best friend.
INTO JAPANESE
彼らはとても素敵で、犬は人間の最良の友です。
BACK INTO ENGLISH
They are very nice and the dog is man's best friend.
INTO JAPANESE
彼らは、非常にいいと、犬は人間の最良の友。
BACK INTO ENGLISH
They are very nice, dog is man's best friend.
INTO JAPANESE
彼らはとても素敵な犬は人間の最良の友。
BACK INTO ENGLISH
They're very nice dogs are man's best friend.
INTO JAPANESE
彼らは非常に素敵な犬は人間の最良の友。
BACK INTO ENGLISH
They are a very nice dog is man's best friend.
INTO JAPANESE
彼らは非常に素敵な犬は人間の最良の友。
BACK INTO ENGLISH
They are a very nice dog is man's best friend.
That didn't even make that much sense in English.