I understood the task, your requirements match my expertise. I will certainly create a registration form similar to given example with verification process and redirection as well as creating log out page. All task will be compatible in Portuguese language and incorporated into your existing WordPress website.
I have 7 years of experience in PHP, MySQL, HTML/HTML5, CSS/CSS3, Ajax, JQuery, Bootstrap v3, JavaScript, WordPress. All my websites adhere to W3C standards and well adaptable to mobile, tablets, laptops and desktops. Please visit my profile to confirm my experience and competency.
I am available for the project. If you can share your website detail, I would be happy in further discussion.
Awaiting your response!
Brijesh P, Web Expert.