ultimatemultisite.com and translate.ultimatemultisite.com are two separate subsites but when logged into ultimatemultisite.com it is impossible to login to translate.ultimatemultisite.com unless cookies are deleted first. I think when translate.ultimatemultisite.com is loaded it needs to use .ultimatemultisite.com as the cookie domain.
ultimatemultisite.com and translate.ultimatemultisite.com are two separate subsites but when logged into ultimatemultisite.com it is impossible to login to translate.ultimatemultisite.com unless cookies are deleted first. I think when translate.ultimatemultisite.com is loaded it needs to use .ultimatemultisite.com as the cookie domain.