YOU SAID:

It is often that someone’s mouth breaks their nose

INTO JAPANESE

誰かの口が鼻を折るのはよくあることです

BACK INTO ENGLISH

It's common for someone's mouth to break their nose

INTO JAPANESE

口が鼻を折るのはよくあることだ

BACK INTO ENGLISH

It is common for the mouth to break the nose.

INTO JAPANESE

口が鼻を折るのはよくあることです。

BACK INTO ENGLISH

It is common for the mouth to break the nose.