Code improvement

Valid XHTML5, correctly idented, HTML entities replaced by correct unicode symbols (more readable and lightweigt).
More work should be done on semantic: semantic classes instead of style one (like “block” or “body > section” instead of “widesec”, to make a cleaner, prettier, smaller and better code, semantic elements should be correctly used (<section> and <article> are several times misused) and correct usage of a variety of adapted elements with CSS advanced selectors should be prefered to a lot of complicated classed and ids within <div>’s soups. Please read W3C recommandations, especially section 4, and learn to apply *rigorously* what you can read in it about *semantic*.
However this would require too much work: rewrite of the whole CSS file (not so hard), and of all the pages of all the languages (uuuuhhhh!), so this is the better I can today.