YOU SAID:

is anyone here also mentaly unstable?

INTO JAPANESE

ここにもメンタルが不安定な人がいるのではないでしょうか。

BACK INTO ENGLISH

Isn't there someone here who is unstable?

INTO JAPANESE

ここには不安定な人がいるのではないか。

BACK INTO ENGLISH

Isn't there someone unstable here?

INTO JAPANESE

ここには不安定な人がいるのでは？

BACK INTO ENGLISH

Isn't there someone unstable here?