YOU SAID:

My dads head happens not to be working today

INTO JAPANESE

私の父の頭は今日たまたま働いていません

BACK INTO ENGLISH

my father's head doesn't happen to work today

INTO JAPANESE

私の父の頭は今日たまたま動かない

BACK INTO ENGLISH

my dad's head just happens to be stuck today

INTO JAPANESE

今日、父の頭がたまたま動かなくなった

BACK INTO ENGLISH

My father's head just happened to stop working today.

INTO JAPANESE

今日、たまたま父の頭が動かなくなった。

BACK INTO ENGLISH

Today, by chance, my father's head stopped working.

INTO JAPANESE

今日、たまたま父の頭が動かなくなりました。

BACK INTO ENGLISH

Today, it so happened that my father's head stopped working.

INTO JAPANESE

今日、たまたま父の頭が動かなくなった。

BACK INTO ENGLISH

Today, by chance, my father's head stopped working.

INTO JAPANESE

今日、たまたま父の頭が動かなくなりました。

BACK INTO ENGLISH

Today, it so happened that my father's head stopped working.