How to log in to pcptplurk.com?

Do not get how to log into and therefore how to use it (help wasn't exactly clear when you haven't even gotten in) the translator pcpt? I opened it in another tab choosed language and pressed log in. got message to go to my account but not what to do there? I did go back to tab with my profile, opened and pressed enter for password but nothing happened when i went back to translator tab. sure hope your not supposted to have it in same tab since that would be a hell in practicaly use ;-) What exactly, step by step, are i'm supposted to do?