Analyse 4 websites which are different language versions of the same site. Make a list of all improvements necessary to improve SERP after recent google PANDA algorithm. (repost)

Hello. We need someone to analyze 4 websites which are different language versions of the same site and to make a list of all improvements necessary to improve SERP after recent google PANDA algorithm. Main site is [login to view URL] This is because we saw a significant drop for some of our more competitive keywords, and a smaller drop for some or our less competitive keywords. We therefore need to make sure the sites and they way they link together and function comply with google, and that there are not any significant errors. We also need a list of proven strategies for improving the ranking which are currently not used on the site. Please only respond if you are highly knowledgeable with current PANDA algorithm characteristics and have recently worked on similar projects, we will needs references of other sites you have worked on which we will check. Many thanks. James.