We'll provide a php based file to you and you will need to translate it to 23 different languages.
We'll show you where you can get the translations from.
Language selection will be auto, system language based, using php's SERVER array.
This page will have a simple sign-up and simple thank you.
All initial xhtml in English will be provided.
So this job requires you to know PHP and XHTML.
You should also be able to do research on different languages.
We can provide more details if you have any questions.
This should be a simple little project. I have years of experience in PHP and HTML (albeit not on Freelancer) and have the skills to get this done for you.