login form

Hi, support team,

if I make survey and set “Access only to logged-in users” function, I could see this login form when I enter the survey like this image : https://imgur.com/a/Ax0utOh

I would like to rewrite the login form. The Korean and English is mixed complexly, so I want to change those words.

I thought that I could resolve this by wordpress custom login plugins, but although I revised wordpress login form in custom login plugin, the login form in survey was not reflected. Could you help me?