YOU SAID:

Senpai is japanesse word

INTO JAPANESE

先輩は書ける単語です。

BACK INTO ENGLISH

Senior is the written word.

INTO JAPANESE

先輩が書かれた言葉です。

BACK INTO ENGLISH

It is written by seniors.

INTO JAPANESE

それは高齢者によって書かれました。

BACK INTO ENGLISH

It was written by a senior citizen.

INTO JAPANESE

それは、高齢者によって書かれました。

BACK INTO ENGLISH

It was written by a senior citizen.