Language Select Reflecting on Login - WCAG


I have been trying to create a language selector that reflects on the login page. I was able havena language select on the login page that will change the language after the user logins in. I wanted to be able to have the user select the language they want at the login and have it reflect on the login page overriding the browser language on login (maybe a refresh that happens).

Any help will be appericated, this is for a website accessibility (WCAG) rather then a nice to have feature.