286558 PHP Software using API

Hi, I need to make a php software that needs to be similar to the original one in the way of looking, layout etc. The original software is avaiable only in English, so i need it to in my current language (portuguese). You don't need to know portuguese to make this work, you can write the software based on a language file where i'll be able to translate/alter text used in the software. It's not a big software, it's supposed to send newsletter, marketing email campaigns etc. Will need PHP and AJAX Knownledge. Will need that the software looks well designed (tables, css).