YOU SAID:

Once a bad joke, always a bad joke.

INTO JAPANESE

一度悪い冗談は、常に悪い冗談。

BACK INTO ENGLISH

Once bad jokes are always a bad joke.

INTO JAPANESE

一度悪い冗談は、常に悪い冗談です。

BACK INTO ENGLISH

Once bad joke is always bad jokes.

INTO JAPANESE

一度悪い冗談は常に悪い冗談であります。

BACK INTO ENGLISH

Once bad joke is always bad jokes.