Hello,
I'm not sure if the website is fully Java, I noticed heavy javascripting on the source code, anyway it can be done within 1 or 2 days. Let me review what I understood :
1. Modification of the presentation for languages, should show flags AND text OR only flags.
2. Repair some few words and implement internationalization (So you can change the strings later), this may be more worksome in case you have too many information on the site.
3. Fix the facebook button.
4. I don't get this point clearly, please provide further information about where can that option be found.
5. Change banner depending on the language chosen by the user.
If I'm correct please let me know, I can start today.